Best PQQ Supplements of 2026

In this guide

• Why you should trust this guide
• Is PQQ legal and regulated in the UK?
• How we test and rank PQQ supplements
• Our evaluation framework
• Best PQQ supplements 2026: comparison table
• Which PQQ supplement is right for you?
• Product reviews
• How does PQQ work?
• What does the human evidence actually show?
• PQQ vs CoQ10 vs NMN: what is the difference?
• Who should take PQQ?
• How to take PQQ: dose, timing and protocol
• What to expect week by week
• Stacking PQQ with CoQ10, NMN and magnesium
• Side effects, safety and interactions
• Seven mistakes people make with PQQ
• Myth vs fact
• Frequently asked questions
• References

Why you should trust this guide

This guide is written to a clinical standard rather than a marketing one. We prioritise dose relevance, formulation integrity, regulatory compliance and long-term practicality, and we tell you where the evidence is weak.

• Dose-led. We rank products by whether they can deliver the dose used in human studies — no more, no less.
• Compliance-led. We check products against the UK authorised intake for PQQ disodium salt.
• Evidence-honest. Where a claim rests on a single small industry-funded trial, we say so.
• Adherence-led. A perfect ingredient you stop taking after 10 days is clinically useless.
• Decision-led. Every review states who the product suits and who should avoid it.

Our commercial position, stated plainly

Welzo sells PQQ supplements, including our own-brand product. That is a commercial interest, and you should weigh it. What we can commit to is that our top pick is chosen on dose, transparency and cost per day — the same criteria we apply to every third-party brand in this list, several of which we also sell and one of which (Jarrow Ubiquinol + PQQ) we recommend over our own product for stack users.

Is PQQ legal and regulated in the UK?

Yes. PQQ disodium salt is an authorised novel food in Great Britain, permitted in food supplements for the general adult population at a maximum of 20 mg per day, excluding pregnant and breastfeeding women. This came from Commission Implementing Regulation (EU) 2018/1122, which was retained in UK law after Brexit and sits on the GB novel foods register.

This single fact should shape your purchase more than any marketing claim, and most "best PQQ" round-ups do not mention it.

What the 20 mg ceiling actually means

Practical takeaway: if a product sold into the UK market states more than 20 mg of PQQ per daily serving, or fails to carry the pregnancy and breastfeeding warning, treat it as a compliance red flag rather than a premium feature.

Are there any approved health claims for PQQ?

No. There are no authorised health claims for PQQ under GB nutrition and health claims law. Any brand telling you PQQ "boosts energy", "improves memory" or "slows ageing" is making an unauthorised claim. Throughout this guide we describe what studies have measured, not what PQQ is guaranteed to do for you.

How we test and rank PQQ supplements

"Tested" here means structured label and formulation evaluation, not a claim that we ran clinical trials. We do not judge PQQ on "instant energy", because no credible mechanism predicts a same-day effect.

What we check on every product

• Dose disclosure: exact milligrams of PQQ per serving, serving size, capsule count and servings per bottle.
• UK compliance: daily serving at or below 20 mg, adult-only labelling, pregnancy and breastfeeding warning present.
• Form: PQQ disodium salt is the form used in human research and the form covered by the novel food authorisation.
• Formulation focus: standalone PQQ for clean evaluation, or a combination with a stated rationale.
• Excipient quality: minimal unnecessary fillers, clear allergen and vegan status.
• Protocol usability: can a typical adult take this daily for 12 weeks without friction?
• Cost per effective daily dose, not bottle price.
• User-reported themes: gastrointestinal tolerance, energy stability, sleep effects, cognitive clarity.

What would make us downgrade a product

• Proprietary blends that hide the PQQ amount.
• Daily servings above 20 mg.
• Ingredient counts high enough that a side effect cannot be attributed.
• Bundled actives with genuine interaction potential, such as berberine, sold without prominent warnings.

Our evaluation framework

1. Effectiveness

Effectiveness in PQQ is dose relevance multiplied by adherence. Research signals appear at around 20 mg per day sustained over 8–12 weeks. A product that makes correct, consistent dosing easy will outperform a "stronger" product you take erratically.

2. Safety

PQQ is well tolerated at 20 mg per day in the trials published so far. We still assess safety through excipients, formulation complexity — more ingredients means more variables — and interaction risk, which is driven far more by co-ingredients such as berberine than by PQQ itself.

3. Cost

We prioritise value per effective dose. A cheap underdosed product is poor value. A premium product can be good value if it reliably delivers 20 mg with high adherence. Every product below is costed per day.

4. Convenience

Convenience is not cosmetic, it is clinical. Capsule count, format and routine compatibility determine whether you stay consistent long enough to judge anything.

Best PQQ supplements 2026: comparison table

Prices are indicative and correct at the time of writing. [VERIFY prices, doses and capsule counts against live product pages before publishing.]

Cost per day assumes one serving daily. Where servings per bottle differ from the table, recalculate before comparing.

Which PQQ supplement is right for you?

Work through these five questions in order and stop at the first one that matches.

1. Is this your first time taking PQQ? → Choose a standalone 20 mg capsule such as Welzo PQQ 20mg. You need a clean baseline before adding anything.
2. Do you struggle to swallow capsules? → Choose Seeking Health PQQ Lozenges. Format that fits your routine beats format that doesn't.
3. Do you already take CoQ10 or ubiquinol, or want one bottle instead of two? → Choose Jarrow Ubiquinol QH-Absorb + PQQ.
4. Is cognition your specific priority and you're comfortable with a blend? → Consider Neuro Biologix Mito-Cell PQQ, accepting that you won't know which ingredient did what.
5. Are you on prescription medication, particularly for diabetes or blood pressure? → Avoid combination products containing berberine and speak to your pharmacist or GP before starting anything.

If none of the above apply and you simply want the lowest cost per day for a long run, Double Wood PQQ is the pragmatic pick.

PQQ supplement reviews

Each review covers who it suits, why it ranks where it does, dosing guidance, honest pros and cons, and how to run a fair 8–12 week trial.

1. Best overall: Welzo PQQ 20mg

Where to buy: Welzo PQQ 20mg

Why it's our best overall pick: this is the cleanest, most evidence-aligned "PQQ-first" product on the list. Twenty milligrams daily is the dose used in the majority of published human PQQ trials, and it sits exactly at the GB authorised maximum. The real advantage is interpretability: with one active ingredient, an 8–12 week trial tells you something meaningful about PQQ rather than about a blend.

Best for:

• Anyone new to PQQ who wants a clean baseline
• People seeking steadier energy rather than a stimulant effect
• Longevity and mitochondrial support routines
• Stackers adding PQQ alongside NMN or CoQ10 without ingredient overlap

How to take it:

• Dose: 20 mg once daily
• Timing: morning or lunchtime; avoid late evening if you are sleep-sensitive
• With food: yes, this improves tolerance
• Trial length: 8 weeks minimum, 12 weeks ideal

Pros

• Dose matches the published human trials exactly
• Single ingredient makes outcomes interpretable
• Competitive cost per day for an own-brand 60-capsule bottle
• Compliant with the UK 20 mg ceiling

Cons

• Effects are subtle and cumulative — wrong choice if you want a same-day lift
• No ubiquinol or B vitamins included, so stackers will need a second product
• Own-brand, so less independent brand history than Life Extension or Jarrow

What users typically report when they respond well: steadier energy across the afternoon, better tolerance of heavy workloads or training blocks, less mental fog by weeks 6–8, and improved recovery perception when sleep and protein intake are also adequate. These are self-reported patterns, not trial outcomes.

2. Best established brand: Life Extension PQQ 20mg

Where to buy: Life Extension PQQ 20mg

Why it ranks highly: a conservative, credible baseline. Life Extension is a long-established supplement brand with a consistent manufacturing record, and vegetarian capsules widen its suitability. If brand history matters to you as a proxy for quality control, this is the safe pick at the correct dose.

Best for: people who prefer a well-known mainstream brand, long-term daily users, and anyone running a conservative single-variable trial.

Practical notes: run the same 8–12 week window; track energy stability, sleep quality and cognitive clarity rather than short-term "kick"; if results are subtle at week 12, pair with ubiquinol rather than escalating to a large stack.

Pros: brand familiarity, correct 20 mg dose, vegetarian capsules, simple once-daily routine.

Cons: 30 capsules means monthly reordering and the highest cost per day of the standalone options — roughly double our top pick.

3. Best mainstream option: Jarrow Formulas PQQ

Where to buy: Jarrow Formulas PQQ

Why it's included: Jarrow is a recognisable name with a consistent product line, and it is often the cheapest per-bottle entry point. Treat it as the dependable "standard PQQ" choice.

Important: Jarrow sells PQQ in more than one strength. Check whether the listing you are buying is 10 mg or 20 mg per capsule before comparing it on price — a 10 mg bottle at half the price is not cheaper per effective dose, and two capsules of a 10 mg product is the correct way to reach 20 mg, which halves the servings per bottle.

Pros: recognisable brand, low entry price, easy to integrate into a routine.

Cons: value depends entirely on which strength you buy; the 10 mg version needs double dosing to match trial intakes.

4. Best value: Double Wood PQQ

Where to buy: Double Wood PQQ

Why it's best value: value in PQQ is not the cheapest bottle, it is the lowest cost per effective daily dose across a full trial. A larger bottle at the correct 20 mg dose usually wins on that maths, and it also removes the reorder friction that quietly ends most supplement protocols at week five.

Best for: cost-conscious users running a genuine 12-week protocol, long-term daily users, and anyone who wants a minimalist routine.

Pros: strongest cost-per-day figure in the list on the larger bottle size, simple formula, fewer reorders.

Cons: higher upfront outlay; bottle sizes vary between listings, so check the count; less brand recognition in the UK than Jarrow or Life Extension.

5. Best combination: Jarrow Ubiquinol QH-Absorb + PQQ

Where to buy: Jarrow Ubiquinol QH-Absorb + PQQ

Why it's the best stack in one bottle: PQQ plus ubiquinol is the most biologically coherent combination available. Ubiquinol is the reduced form of CoQ10 and functions within the mitochondrial electron transport chain — the machinery that generates ATP. PQQ is associated with mitochondrial signalling and biogenesis pathways. One supports the existing machinery, the other is linked to building more of it. They are not redundant.

The softgel format also matters here: ubiquinol is fat-soluble, and softgels in an oil base generally absorb better than dry powder in a capsule.

Best for: people already taking CoQ10, statin users who have been advised about CoQ10 [check with your prescriber first], and anyone prioritising stamina and recovery over clean interpretability.

Pros: excellent stack logic, better-absorbed ubiquinol format, one bottle instead of two.

Cons: you cannot tell which ingredient is responsible for any change; usually more expensive than a standalone PQQ; check the PQQ amount per softgel, which is often below 20 mg.

6. Best cognition-forward formula: Neuro Biologix Mito-Cell PQQ

Where to buy: Neuro Biologix Mito-Cell PQQ

Why it ranks for cognition: the brain is metabolically expensive — it accounts for roughly 20% of resting energy expenditure despite being about 2% of body weight — which is why mitochondrial support is so often framed around mental performance. This product pairs PQQ with additional mitochondrial-supportive nutrients, which some users find produces a more noticeable effect than PQQ alone.

Who it suits: people whose primary goal is focus and mental stamina, users who already have decent sleep hygiene and want an additional layer, and those comfortable trading interpretability for breadth.

How to evaluate it: still 8–12 weeks. Track sustained attention, afternoon drop-off, mental fatigue and perceived processing speed. If you are sensitive to supplements, start on a half serving for 7–10 days where the label permits.

Pros: potentially stronger felt effect for cognition-focused users; covers several mitochondrial pathways in one product.

Cons: by far the highest cost per day in this list; more ingredients means more chance of an individual intolerance; impossible to attribute results to PQQ.

7. Best alternative format: Seeking Health PQQ 20mg Lozenges

Where to buy: Seeking Health PQQ Lozenges

Why format matters: most supplement round-ups ignore the single biggest determinant of whether a supplement works for you — whether you keep taking it. If you dislike swallowing capsules, or have dysphagia, a lozenge can be the difference between a completed 12-week trial and an abandoned one.

A note on absorption: lozenges are often marketed as "sublingual" with implied superior uptake. There is no good human data comparing sublingual PQQ to capsules. Choose this format because it suits you, not because you expect better absorption.

Pros: removes the capsule barrier, portable, correct 20 mg dose.

Cons: taste and texture are divisive; typically higher cost per day; usually contains sweeteners, which some users prefer to avoid.

8. Advanced metabolic combination: Dr Mercola Berberine + MicroPQQ

Where to buy: Dr Mercola Berberine + MicroPQQ

Why it's "advanced": this pairs PQQ with berberine, a plant alkaloid widely used in metabolic health protocols and studied for effects on glucose metabolism. The logic is coherent for someone targeting energy and metabolic resilience together.

Pros: strong stack logic for metabolic goals; one product instead of two.

Cons: meaningful interaction potential; not a beginner product; "MicroPQQ" is a branded form, and branding is not evidence of superiority.

9. Alternative option: Zinplex PQQ Capsules

Where to buy: Zinplex PQQ Capsules

Why it's included: a further option for users who want to trial a different brand without changing their protocol structure. As with any alternative, the decision comes down to the same three numbers: milligrams per serving, servings per bottle and price.

Selection tip: compare the per-day cost against our top pick before switching. Brand variety has no clinical value in itself.

How does PQQ work?

PQQ is a small quinone molecule found in trace amounts in foods such as natto, fermented soy, parsley, green peppers, kiwi fruit and human breast milk. In laboratory research it acts as a redox cofactor and appears to influence signalling pathways involved in mitochondrial biogenesis and antioxidant defence. It is not a vitamin — no human deficiency state has been established.

PQQ and mitochondrial biogenesis

Mitochondria are not static. The body continuously adjusts their number and function according to energy demand, stress, age and nutrient availability. Mitochondrial biogenesis is the process of building new ones.

The most-cited mechanistic work here is Chowanadisai and colleagues (Journal of Biological Chemistry, 2010), which reported that PQQ stimulated mitochondrial biogenesis in cell culture through CREB phosphorylation and increased expression of PGC-1α — a master regulator of mitochondrial production. This is cell-culture work, not human evidence, and that distinction matters: a great deal of marketing copy quietly converts "in cultured cells" into "in you".

What it does explain is why PQQ behaves the way it does in practice. If a compound works by supporting cellular adaptation, it needs weeks, not hours.

Redox cycling and antioxidant signalling

Oxidative stress is not simply "bad" — the body uses redox signals to drive adaptation, which is partly why very high-dose antioxidants can blunt training adaptations. The goal is balance, not elimination.

PQQ is notable for its capacity to cycle through repeated redox reactions rather than being consumed after one, which is the basis of the claim that it is an unusually efficient antioxidant participant. It has also been reported to influence endogenous antioxidant signalling.

Inflammation and metabolic markers

Harris and colleagues (Journal of Nutritional Biochemistry, 2013) gave PQQ to a small group of human volunteers and reported changes in inflammation-related markers including C-reactive protein and interleukin-6, alongside shifts in urinary metabolites linked to mitochondrial metabolism. This was a small crossover study, but it remains one of the few pieces of human mechanistic data available.

What does the human evidence actually show?

Here is the honest position: PQQ has more human data than most "cellular energy" supplements, and far less than a genuine clinical intervention. The trials are small, mostly conducted in Japanese adults, and mostly funded by or connected to ingredient manufacturers. That does not make them wrong; it does mean the effects should be treated as provisional.

What we can and cannot say

• Reasonably supported: at 20 mg/day over 12 weeks, PQQ has produced measurable improvements in muscle strength and some cognitive measures in small randomised trials.
• Plausible but unproven: effects on fatigue, sleep quality and general "energy". The sleep and mood data come largely from an uncontrolled trial.
• Not established: any effect on lifespan, healthspan, disease prevention or long-term cognitive decline. No trial has tested these.
• No official guidance exists. Neither the NHS nor NICE has issued guidance on PQQ supplementation, and there is no Cochrane review of PQQ. Its absence from those sources reflects a thin evidence base, not a negative verdict.

If you want the clinical literature yourself, search "pyrroloquinoline quinone" on PubMed.

PQQ vs CoQ10 vs NMN: what is the difference?

These three are constantly marketed together and constantly confused. They are not interchangeable.

If you can only pick one: choose CoQ10 or ubiquinol if you are over 50, taking a statin, or focused on cardiovascular support. Choose PQQ if you already take CoQ10 and want to add a different mechanism. Explore NMN supplements if your interest is specifically NAD⁺ and longevity.

Who should take PQQ?

PQQ may suit you if you want:

• Steadier energy across the day rather than an immediate stimulant effect
• Support for mitochondrial and cellular resilience as part of a healthy-ageing routine
• Cognitive stamina support assessed over weeks, not hours
• Something to add to a routine during periods of high workload, travel or heavy training
• A supplement with a plausible mechanism and at least some randomised human data

PQQ is probably not for you if you want:

• An immediate lift — caffeine does that, PQQ does not
• A supplement to compensate for insufficient sleep, poor nutrition or inactivity
• Results from a 7–14 day trial, which is too short to judge anything
• A treatment for diagnosed fatigue. Persistent fatigue warrants a GP appointment, not a supplement — anaemia, thyroid dysfunction, coeliac disease, diabetes, sleep apnoea, depression and vitamin B12 or vitamin D deficiency are all common, testable and treatable causes.

If fatigue is your main reason for reading this, blood testing is a more logical first step than supplementation. It is worth ruling out the common causes before spending three months on a trial.

How to take PQQ: dose, timing and protocol

Standard protocol

If you are sensitive to supplements

• Take half a serving, or dose every other day, for the first 10–14 days where the label allows
• Move to daily dosing once tolerance is established
• Keep everything else stable — sleep schedule, caffeine intake, training volume — or you will not be able to attribute any change

How to actually track results

Score these weekly, out of 10, in your phone's notes app. Subjective tracking sounds unscientific, but a week-1 baseline you wrote down beats a week-12 memory every time.

• Frequency and intensity of the afternoon energy dip
• Mental fatigue in the last two hours of the working day
• Sleep quality and how long it takes you to fall asleep
• Recovery between training sessions, and training consistency
• General stress tolerance

What to expect week by week

This timeline reflects the dosing schedules used in published trials and commonly reported user patterns. It is a guide to expectations, not a promise of results — a meaningful proportion of people notice nothing at all.

If nothing has changed by week 12 at 20 mg daily, stop. Continuing is spending money on an intervention that has already been tested on you and did not work.

Stacking PQQ with CoQ10, NMN and magnesium

PQQ + CoQ10 or ubiquinol

The most coherent mitochondrial pairing, and the one with the clearest rationale. Ubiquinol operates inside the electron transport chain; PQQ is linked to the signalling that governs mitochondrial production. For a single combined product, see Jarrow Ubiquinol QH-Absorb + PQQ. Take it with a meal containing fat — ubiquinol absorption depends on it.

PQQ + NMN

NMN supports NAD⁺ production; PQQ is associated with mitochondrial signalling and redox balance. Many longevity routines use both, though no trial has tested the combination for added benefit. If you stack them, introduce one first for 2–3 weeks, then add the second, so you can tell which is responsible for any effect — or any side effect.

PQQ + magnesium

Magnesium is a cofactor in hundreds of enzymatic reactions including ATP metabolism, and UK dietary intakes are frequently below the reference nutrient intake. This is a sensible general addition rather than a specific synergy with PQQ. Magnesium glycinate is usually the best-tolerated form if sleep is a priority; magnesium citrate is more likely to loosen stools.

PQQ + creatine

Worth knowing: if your actual goal is more physical and mental energy and you are not already taking creatine monohydrate, creatine has a far larger and better-established evidence base than PQQ, at a fraction of the cost. There is no reason not to take both, but do not let PQQ crowd out the better-supported option.

When not to stack

If you are new, run standalone PQQ such as Welzo PQQ 20mg first. Starting with four new supplements at once means that if something works, you won't know what — and if something upsets you, you won't know what to stop.

Side effects, safety and interactions

Is PQQ safe?

At 20 mg per day, PQQ has been well tolerated in the human trials published so far, and EFSA's safety assessment supported that intake for healthy adults. The important caveats are that the trials are small and short, long-term data beyond about 12 weeks is essentially absent, and no data exists for pregnancy, breastfeeding or under-18s — which is precisely why the authorisation excludes those groups.

Side effects at a glance

Serious adverse effects have not been reported at supplemental doses. If you experience anything severe or unexpected, stop taking the product and speak to a healthcare professional. Suspected side effects from a supplement can be reported to the relevant UK authority — your pharmacist can advise on the right route.

Who should not take PQQ

• Pregnant or breastfeeding women — excluded from the UK authorisation, with no safety data
• Anyone under 18 — the authorisation covers adults only
• Anyone with kidney disease — speak to your clinician first, given the renal findings at very high doses in animal studies

Speak to your GP or pharmacist first if you

• Take any prescription medication, particularly for diabetes, blood pressure or anticoagulation
• Have a complex or unstable medical condition
• Have a history of cancer — discuss any mitochondrial- or antioxidant-active supplement with your oncology team, as high-dose antioxidants may interact with some treatments
• Are due to have surgery — most clinicians advise stopping non-essential supplements around two weeks beforehand

Interactions to be aware of

• Berberine-containing products: the most significant interaction risk in this category. Berberine can lower blood glucose and inhibits CYP450 enzymes, so it may amplify diabetes medication and raise levels of other drugs. See our note on Dr Mercola Berberine + MicroPQQ.
• CoQ10 and warfarin: CoQ10 is structurally similar to vitamin K and has been reported to reduce warfarin's effect in some cases. If you take warfarin and are considering a PQQ + ubiquinol product, discuss it with your anticoagulation clinic first.
• Diabetes and blood pressure medication: caution with any metabolic stack, and monitor accordingly.
• PQQ alone has no well-documented drug interactions, but "no documented interactions" reflects limited study rather than proven safety.

The general NHS position on supplements is a useful frame: for most people, a balanced diet supplies what is needed, and supplements should complement rather than replace it. See the NHS guidance on vitamins and minerals.

Seven mistakes people make with PQQ

1. Quitting at week three. By far the most common. Every positive trial ran at least eight weeks. Judging PQQ at day 20 is like judging a training programme after two sessions.
2. Buying on bottle price. A £22 bottle of 10 mg capsules taken at two per day is not cheaper than a £30 bottle of 20 mg capsules. Always calculate cost per effective daily dose.
3. Chasing higher doses. Forty milligrams is not "twice as effective". It is above the UK authorised intake and untested for extra benefit.
4. Starting four supplements the same week. You lose all ability to attribute cause. Introduce one thing at a time, 2–3 weeks apart.
5. Expecting a stimulant. PQQ has no acute effect. If you want to feel something within an hour, you want caffeine.
6. Using it to paper over sleep debt. No mitochondrial supplement compensates for chronically sleeping five hours.
7. Not getting persistent fatigue investigated. Three months of supplements is three months not spent finding a treatable cause. Get the blood tests first.

Myth vs fact

Frequently asked questions

What is PQQ used for?

PQQ is used as a supplement for mitochondrial and cellular energy support, cognitive stamina and healthy-ageing routines. It is not a stimulant and is best evaluated over 8–12 weeks. No health claims for PQQ are authorised in the UK.

What is the best PQQ supplement?

For most people, a standalone 20 mg capsule offers the best combination of evidence-aligned dosing, interpretability and cost per day. Our top pick is Welzo PQQ 20mg.

How long does PQQ take to work?

Allow 8–12 weeks. The randomised trials reporting benefits for muscle strength and cognition ran for 12 weeks at around 20 mg per day. There is no meaningful same-day effect, and short trials of one or two weeks will tell you nothing.

What is the correct PQQ dosage?

Twenty milligrams once daily with food. This matches the dose used in human trials and is the maximum daily amount authorised for food supplements in Great Britain. Higher doses are not better supported.

Is 40mg of PQQ too much?

It exceeds the 20 mg daily maximum authorised for PQQ in UK food supplements, and no trial has shown additional benefit above 20 mg. There is no reason to take it and a straightforward reason not to.

Is PQQ better than CoQ10?

They do different things and are not competitors. CoQ10 or ubiquinol functions within the mitochondrial electron transport chain and has a considerably stronger evidence base. PQQ is linked to mitochondrial signalling and biogenesis pathways. If you have to choose one, CoQ10 is the better-evidenced starting point; many people take both.

Should I take PQQ with ubiquinol?

It is the most biologically coherent pairing available, and a single combined product such as Jarrow Ubiquinol QH-Absorb + PQQ is convenient. Take it with a meal containing fat, since ubiquinol is fat-soluble.

Can I take PQQ with NMN?

Many longevity routines combine them, though no trial has tested the pair. Introduce one for 2–3 weeks first, then add the second, so you can attribute any effect. Browse NMN supplements.

Should I take PQQ in the morning or at night?

Morning or early afternoon. A small number of people find late-day dosing disrupts sleep. Since PQQ is taken for cumulative rather than acute effects, timing matters far less than taking it consistently.

Should I take PQQ with or without food?

With food. It is better tolerated, and if you are taking it alongside CoQ10 or ubiquinol, a meal containing some fat helps absorption of the fat-soluble ingredient.

Do I need to cycle PQQ?

No. There is no evidence that cycling is necessary or beneficial. The trials used continuous daily dosing.

What are the side effects of PQQ?

Side effects are uncommon and usually mild: stomach upset, headache, or occasionally disturbed sleep. Taking it with food and dosing in the morning resolves most cases. Stop and seek advice if you develop a rash or anything severe.

Who should avoid PQQ?

Pregnant and breastfeeding women and anyone under 18 — these groups are excluded from the UK authorisation. Anyone with kidney disease, a complex medical condition, a cancer history, or on prescription medication should speak to their GP or pharmacist first.

Is PQQ safe for the kidneys?

At supplemental doses there is no evidence of kidney harm in humans. Animal studies did show urinary crystals and protein at very high intakes — the equivalent of hundreds of times a normal supplemental dose — and this is one reason the authorised limit exists. If you have existing kidney disease, discuss it with your clinician before starting.

Can I take PQQ long term?

Human trials have generally run up to about 12 weeks, so there is no long-term safety data at supplemental doses. Many people take it continuously; if you do, mention it at medication reviews and reassess periodically whether it is still delivering anything.

Does PQQ help with fatigue?

The sleep and fatigue findings come mainly from a small open-label study without a control group, which is weak evidence. If fatigue is persistent, see your GP — anaemia, thyroid problems, coeliac disease, diabetes, sleep apnoea, depression and B12 or vitamin D deficiency are common and testable causes.

Does PQQ help you sleep?

Improvements in sleep quality scores were reported in one uncontrolled 8-week study at 20 mg per day. That is a signal, not proof. Contradictorily, a small number of users report the opposite, which is why morning dosing is recommended.

Can PQQ help with brain fog?

Trials have measured attention and visuospatial cognition rather than "brain fog", which is not a clinical diagnosis. Some improvement in cognitive measures has been reported at 20 mg over 12 weeks in small studies. Persistent brain fog is worth discussing with a GP, since it can accompany thyroid disorders, anaemia, sleep disorders, perimenopause and long COVID.

Is a PQQ blend better than standalone PQQ?

Not inherently. Standalone gives you a clean read on whether PQQ works for you. Blends can be useful where the logic is sound, such as PQQ with ubiquinol, but they cost more and remove your ability to attribute any effect.

What is MicroPQQ or BioPQQ?

These are branded, trademarked forms of PQQ disodium salt. BioPQQ is the form assessed by EFSA and used in several published trials, which is genuinely useful for traceability. Branding alone, though, is not evidence of superior performance — the decision still comes down to dose, tolerance and price.

Is PQQ vegan?

Commercially produced PQQ disodium salt is made by bacterial fermentation and is not animal-derived. The capsule shell determines vegan status — vegetarian or vegan capsules are common but always check the specific product label.

Which PQQ is best if I can't swallow capsules?

A lozenge such as Seeking Health PQQ Lozenges. Adherence matters far more than format, so choose whichever you will actually take daily.

Can I get PQQ from food instead?

Only in trace amounts. PQQ occurs in natto, fermented soybeans, parsley, green peppers, kiwi fruit, green tea and human breast milk, but typical dietary intake is well below 1 mg a day — a small fraction of the 20 mg used in trials.

Does PQQ interact with any medications?

PQQ alone has no well-documented drug interactions, though it has not been extensively studied. The real risk sits with co-ingredients: berberine-containing products can interact with diabetes medication and drugs metabolised by CYP450 enzymes, and CoQ10 has been reported to reduce warfarin's effect. Always check combination products with your pharmacist.

Where can I buy PQQ supplements in the UK?

Browse the full range in the Welzo PQQ Supplements Collection, with free UK delivery options and pharmacist support available.

Final verdict

PQQ is best understood as a cellular resilience supplement with a plausible mechanism and a small but real body of randomised human evidence — not as an energy booster and not as a proven longevity intervention. If you choose the trial-aligned 20 mg dose, take it consistently with food, and give it a fair 8–12 weeks, you will get a genuine answer about whether it does anything for you.

Three practical recommendations:

• Starting out: Welzo PQQ 20mg — cleanest read at the correct dose.
• Want a full mitochondrial stack in one bottle: Jarrow Ubiquinol QH-Absorb + PQQ.
• Committing to a long run: Double Wood PQQ for the lowest cost per day.

And the honest caveat worth repeating: if your underlying issue is persistent fatigue or cognitive difficulty, get it investigated before you spend three months on any supplement.

View the full range: PQQ Supplements Collection

References

1. EFSA Panel on Dietetic Products, Nutrition and Allergies. Safety of pyrroloquinoline quinone disodium salt as a novel food pursuant to Regulation (EC) No 258/97. EFSA Journal, 2017. View opinion
2. Commission Implementing Regulation (EU) 2018/1122 authorising the placing on the market of pyrroloquinoline quinone disodium salt as a novel food. View on legislation.gov.uk
3. Nakano M, et al. Efficacy and safety of a novel dietary pyrroloquinoline quinone disodium salt on muscle strength and physical function in healthy volunteers: a randomized, double-blind, placebo-controlled study. Journal of Functional Foods, 2024. View study
4. Nakano M, et al. Effects of oral supplementation with pyrroloquinoline quinone on stress, fatigue and sleep. Functional Foods in Health and Disease, 2012. View study
5. Itoh Y, et al. Effect of the antioxidant supplement pyrroloquinoline quinone disodium salt (BioPQQ) on cognitive functions. Advances in Experimental Medicine and Biology, 2016.
6. Harris CB, et al. Dietary pyrroloquinoline quinone (PQQ) alters indicators of inflammation and mitochondrial-related metabolism in human subjects. Journal of Nutritional Biochemistry, 2013.
7. Chowanadisai W, et al. Pyrroloquinoline quinone stimulates mitochondrial biogenesis through CREB phosphorylation and increased PGC-1α expression. Journal of Biological Chemistry, 2010.
8. Baltic S, et al. The impact of six-week dihydrogen-pyrroloquinoline quinone supplementation on mitochondrial biomarkers, brain metabolism and cognition in elderly individuals with mild cognitive impairment: a randomized controlled trial. Journal of Nutrition, Health & Aging, 2024. View on PubMed
9. NHS. Vitamins and minerals. View NHS guidance