Best MCT Oil Supplements UK, Expert Reviews & Where to Buy

If you’re searching for the best MCT oil supplements in the UK, you want products that deliver clean, fast energy, support cognitive focus, and fit easily into your daily routine — whether you’re following a ketogenic diet, low-carb lifestyle, or simply looking for sustained energy without sugar or caffeine.

MCT (medium-chain triglyceride) oil has become one of the most talked-about supplements in recent years because it’s quickly absorbed, rapidly converted into usable energy, and can support ketosis and metabolic flexibility. But with liquids, powders, and capsules all claiming to be “the best,” making a choice can be confusing.

This guide cuts through the hype and highlights the top MCT oil supplements available to buy online from Welzo UK. Each product has been evaluated using a consistent framework that considers formulation quality, ingredient transparency, user reviews, value for money, and practical usability.

I’m Dr Zeeshan Afzal, a UK-based doctor specialising in nutrition and evidence-based supplementation. My goal with this guide is to help you make an informed choice — with clarity on what MCT oil does, how different formats compare, and which products deliver real results.

What Is MCT Oil?

MCT oil contains medium-chain triglycerides, a type of fat that the body metabolises differently from the long-chain fats found in most foods. When you consume MCTs, they are absorbed rapidly and transported directly to the liver, where they are used for energy or converted into ketones — an efficient fuel source for both the brain and body.

This unique metabolic pathway is why MCT oil is especially popular among people on ketogenic or low-carb diets, but benefits can extend to:

• Improved energy levels without crash-inducing sugars

• Enhanced cognitive focus due to ketone availability

• Support for weight management as part of a balanced diet

• Versatile use in drinks, shakes, or meals

MCTs are commonly broken down into two main fatty acids:

• Caprylic acid (C8): Rapidly converted into ketones, often preferred for cognitive support

• Capric acid (C10): Slightly slower-acting but still beneficial for sustained energy

There are several popular formats for MCT supplements, each suited to different needs:

• Liquid MCT oils — flexible dosing and fast absorption

• Powdered MCT — easy to mix into coffee or shakes

• MCT softgels — convenient, pre-measured capsules

Choosing the right format comes down to your preferences and lifestyle.

Why Trust This Guide?

This article is based on evidence and expert evaluation, not marketing claims. Each product included has been reviewed against criteria that matter most to users:

• Ingredient transparency: Clear C8/C10 ratios, pure sources, no unnecessary additives

• Formulation quality: Ease of use, absorption, mixability

• Brand reputation & safety: Trusted manufacturers with quality standards

• Consumer feedback: Real reviews and ratings from verified buyers on Welzo

My clinical experience in nutrition and ongoing review of scientific research informs these rankings — so you can feel confident in what you buy.

Our Top Picks for MCT Oil Supplements in the UK

Best Overall: Applied Nutrition MCT Oil – 490 ml
A versatile, high-quality liquid MCT oil suitable for beginners and experienced users alike. Perfect for coffee, smoothies, or meals.

Also Great: Now Foods MCT Oil Liquid – 32 oz
Large bottle size with neutral flavour and excellent value per ml, ideal for regular MCT users.

Best Convenience / Capsules: Osavi MCT Oil 1000 mg Softgels
Mess-free, portable, pre-measured capsules — perfect for travel or on-the-go dosing.

Best Trusted Brand Capsules: Swanson MCT Pure 1000 mg – 90 Softgels
Reliable, clean formula with convenient dosing; a solid choice for daily supplementation.

Best Powder for Smoothies & Drinks: BiotechUSA MCT Drink Powder – 300 g
Mixes easily into coffee or protein shakes; ideal for gym enthusiasts and active lifestyles.

Best Unflavoured Powder: EVLution Nutrition MCT Powder – 200 g
Clean, tasteless powder that blends seamlessly into drinks without altering flavour.

Best Combined Formula: Carlson Labs MCT & Omega-3 – 120 + 30 Softgels
Dual-benefit softgel formula providing MCT energy support along with heart-healthy omega-3s.

Best Budget-Friendly: [Optional: pick lowest-cost option from Welzo]
Provides solid MCT benefits at an accessible price point for daily use.

Best Liquid for Keto & Fasting: High C8 MCT Oils
Rapid ketone production for cognitive clarity, sustained energy, and support during fasting.

Best Goal-Specific Blend: C8/C10 Combination Oils
Balanced formula for both immediate energy and longer-lasting performance throughout the day.

Best MCT Oil Supplements UK — Ranked

Here are the top MCT oil supplements available from Welzo, ranked based on quality, usability, and value:

1. Applied Nutrition MCT Oil – 490 ml

Why it’s selected: A highly versatile and well-reviewed liquid MCT oil that suits both beginners and seasoned users.

Product description: A pure MCT oil derived from coconut and palm kernel oil — ideal for coffee, smoothies, or meals.

Product reviews: Excellent user ratings on Welzo with consistent positive feedback.

Product price: Live pricing shown on Welzo.

Where to buy: Exclusively from Welzo UK.

Pros:

• Clear ingredient profile

• Fast energy support

• Works well in drinks and recipes

Cons:

• Liquid format may not suit everyone

• No flavour options

How to use: 1 tablespoon (approx. 15 ml) daily in coffee or shakes.

Editor’s comments: A top all-rounder and one of the most popular MCT oils on Welzo.

 

2. Now Foods MCT Oil Liquid 32oz

Why it’s selected: Larger bottle size with great value and neutral taste.

Product description: Pure, versatile MCT oil suitable for daily use.

Product reviews: High satisfaction from buyers who use it in drinks or meals.

Product price: Listed live on Welzo.

Where to buy: Welzo UK.

Pros:

• Large size, good value per ml

• Neutral flavour

Cons:

• Slightly higher price than smaller bottles

How to use: Take 1 tbsp daily, or as directed.

Editor’s comments: Best for regular MCT users who want quantity and quality.

 

3. Osavi MCT Oil 1000mg Softgels

Why it’s selected: Convenient capsule form for mess-free dosing.

Product description: MCT oil in easy-to-swallow softgels.

Product reviews: Positive user experience for convenience and portability.

Product price: Available on Welzo.

Where to buy: Welzo UK.

Pros:

• No measuring required

• Great for travel

Cons:

• Less flexible dosing than liquid

How to use: Take with food as instructed.

Editor’s comments: Excellent choice if you prefer capsules over liquid.

 

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4. Swanson MCT Pure 1000mg 90 Softgels

 

Why it’s selected: Trusted brand softgels with a clean formula.

Product description: MCT oil encapsulated for easy daily use.

Product reviews: Strong feedback for quality and simplicity.

Product price: Shown on Welzo.

Where to buy: https://welzo.com/products/swanson-mct-pure-1000mg-90-softgels

Pros:

• Trusted brand

• Convenient dosing

Cons:

• Slightly lower dose per capsule compared to larger liquids

How to use: 1–2 capsules with meals.

Editor’s comments: Great for consistent daily support.

 

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5. BiotechUSA MCT Drink Powder – 300g

Why it’s selected: Powder format for easy mixing into shakes and coffee.

Product description: MCT powder that blends smoothly into drinks.

Product reviews: Positive feedback for mixability and versatility.

Product price: Available on Welzo.

Where to buy: https://welzo.com/products/biotechusa-mct-drink-powder-300-grams

Pros:

• Easy to mix

• Ideal for gym enthusiasts

Cons:

• Absorption may differ from liquid

How to use: Stir into drinks daily.

Editor’s comments: A flexible option for active lifestyles.

6. EVLution Nutrition MCT Powder Unflavoured – 200g

Why it’s selected: Clean, unflavoured MCT powder for seamless use.

Product description: Unflavoured powder suitable for a variety of drinks.

Product reviews: Well received for taste neutrality and mixability.

Product price: Shown on Welzo.

Where to buy:  https://welzo.com/products/evlution-nutrition-mct-powder-unflavored-200-grams

Pros:

• No flavour

• Great in smoothies

Cons:

• Smaller size than some competitors

How to use: Mix into coffee or protein shakes.

Editor’s comments: A simple, high-quality powdered option.

 

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7. Carlson Labs MCT & Omega-3 – 120 + 30 Softgels

Why it’s selected: Combines MCT benefits with heart-healthy omega-3s.

Product description: Softgel formula that supports energy and cardiovascular health.

Product reviews & price: Available now on Welzo.

Where to buy: https://welzo.com/products/carlson-labs-mct-omega-3-120-30-softgels

Pros:

• Dual benefit formulation

• Easy to use

Cons:

• Not purely MCT — blended formula

How to use: Take with meals as directed.

Editor’s comments: Ideal for users who want breadth of support.

Evaluation Criteria

To determine the best MCT oil supplements, the following factors were weighed:

• Ingredient transparency — clear labelling of MCT sources and ratios

• Formulation quality — ease of use and delivery format

• Value for money — cost per effective serving

• Consumer feedback — real reviews on Welzo

• Brand reputation & safety standards

These criteria help distinguish products that perform well in everyday use from those that are simply marketed well.

 

Side Effects & Considerations

MCT oil is generally well tolerated, but start with small doses to avoid digestive discomfort. Possible side effects may include:

• Bloating and gas

• Loose stools or diarrhoea at high doses

• Stomach cramps

If you have digestive sensitivities or medical conditions, consult your healthcare provider before use.

How MCT Oil Works in the Body (Science-Backed Explanation)

Medium-chain triglycerides (MCTs) are a unique form of dietary fat that are metabolised differently from long-chain fatty acids found in most foods.

Unlike traditional fats, MCTs:

• Are absorbed directly through the portal vein

• Do not require bile salts for digestion

• Are rapidly transported to the liver

• Are quickly converted into ketones

Ketones are an alternative fuel source to glucose, particularly for the brain and muscles. This is why MCT oil is widely used to support mental energy, physical performance, and metabolic efficiency, especially in low-carbohydrate or ketogenic diets.

Because of this rapid conversion, MCT oil provides a fast, clean source of energy without the blood sugar spikes associated with carbohydrates.

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The Different Types of MCTs Explained (C6, C8, C10, C12)

Not all MCT oils are the same. There are four main types of medium-chain fatty acids, each with different properties and benefits.

Caproic Acid (C6)

• Converts quickly into ketones

• Often causes digestive discomfort

• Rarely included in quality supplements

Caprylic Acid (C8)

• Fastest MCT to convert into ketones

• Highly efficient brain and body fuel

• Commonly used in premium MCT oils

• Ideal for keto diets, fasting, and cognitive performance

Capric Acid (C10)

• Slightly slower ketone production than C8

• More sustained energy release

• Often combined with C8 for balanced effects

Lauric Acid (C12)

• Found in coconut oil

• Technically a long-chain fat

• Digested more slowly

• Less effective for rapid ketone production

Best choice:
High-quality MCT oil supplements typically contain C8 alone or a C8/C10 blend, as these provide the most efficient and tolerable energy support.

MCT Oil vs Coconut Oil: What’s the Difference?

 Although coconut oil naturally contains MCTs, it is not the same as pure MCT oil.

MCT oil is a refined extract that isolates the most effective medium-chain fatty acids, making it far superior for:

• Ketone production

• Cognitive energy

• Fasted performance

• Metabolic support

Benefits of MCT Oil Beyond Basic Energy

Cognitive Performance & Mental Clarity

Ketones produced from MCT oil serve as an efficient fuel source for the brain. Many users report improved focus, alertness, and mental endurance, particularly during fasting or low-carb diets.

Intermittent Fasting Support

MCT oil:

• Does not spike insulin

• Helps reduce hunger

• Provides energy during fasting windows

This makes it a popular addition to coffee or tea during intermittent fasting protocols.

Metabolic & Weight Management Support

MCTs may:

• Increase fat oxidation

• Support thermogenesis

• Promote satiety

When combined with a balanced diet and active lifestyle, MCT oil can support body composition goals.

Physical Performance

Athletes and active individuals often use MCT oil as a non-carbohydrate energy source for endurance, strength training, and recovery.

MCT Oil and Nutrient Absorption

MCT oil can enhance the absorption of fat-soluble nutrients and compounds, including:

• Vitamins A, D, E, and K

• Omega-3 fatty acids

• Certain nootropic and herbal extracts

This makes MCT oil a useful carrier oil when taken alongside supplements that require dietary fat for optimal bioavailability.

How to Use MCT Oil: Dosage & Timing Guide

Recommended Dosage

• Beginner: 1 teaspoon (5 ml) per day

• Standard use: 1 tablespoon (15 ml) per day

• Advanced users: Up to 2 tablespoons daily, split into doses

Best Timing

• Morning (with coffee or breakfast)

• Pre-workout

• During fasting periods

• With meals containing fat-soluble nutrients

Tip: Always start with a low dose and increase gradually to avoid digestive discomfort.

Side Effects & Safety Considerations

MCT oil is generally safe for most people, but potential side effects include:

• Bloating

• Nausea

• Diarrhoea (especially at high doses)

To minimise side effects:

• Start with small amounts

• Take with food initially

• Avoid excessive dosing

Those with liver conditions or digestive disorders should consult a healthcare professional before use.

Choosing the Best MCT Oil for Your Goals

What the Research Actually Says About MCT Oil Benefits

While many supplement guides focus on product features, clinical studies provide the strongest evidence of how MCT oil affects the body. Here are key findings from peer-reviewed research you can include:

MCTs May Support Brain Function and Memory

Multiple human trials have found that MCT supplementation can improve specific aspects of memory and cognitive performance, particularly in older adults:

• A systematic review of randomized controlled trials reported that MCTs were associated with improvements in working memory in 4 out of 6 studies in non-demented older adults. BMC Geriatrics, 2022

• MCT-induced ketone production is thought to provide an alternative energy source for neurons, which can be especially useful when glucose utilization is impaired. PMC Article

• In a pilot trial using neuroimaging, healthy elderly adults showed better working memory performance after an MCT meal compared with a placebo meal, suggesting ketones can boost executive function. MDPI Nutrients, 2021

These findings suggest MCT oil may benefit brain energy metabolism and cognitive tasks, especially working memory and executive function.

Ketone Production: The Key Mechanism

MCTs stand out because they are rapidly converted into ketones — small energy molecules the brain and body can use efficiently.

• A meta-analysis found that compared with placebo, MCTs elevated circulating ketones (β-hydroxybutyrate) by ~0.355 mmol/L in adults, a statistically significant increase. PMC Article

• Elevated ketones provide an alternative energy source to glucose, which may help support neural health when carbohydrate intake is low. PMC Article

This supports why MCT oil is particularly popular among ketogenic and low-carb practitioners — because it boosts ketosis even without strict carbohydrate restriction.

Effects on Metabolism, Weight & Glucose

Research shows that MCTs may influence metabolic rate and body composition:

• A meta-analysis of 13 trials (n=749) found that diets with MCTs led to modest reductions in body weight (−0.51 kg) and waist circumference (−1.46 cm) compared to long-chain fats. PubMed, 2015

• In a controlled study, MCT intake consistently increased ketone production and metabolic rate while lowering blood glucose — effects that persisted over daily supplementation and were observed in both lean and obese participants. PubMed, 2023

These data suggest MCT oil may support metabolic health and fat oxidation when used regularly as part of a balanced diet.

Emerging Evidence: Gut & Muscle Health

Although most research focuses on energy and cognition, novel results are emerging:

• MCT supplementation in older adults was associated with improvements in gait stability and balance, possibly linked to changes in glucose metabolism in skeletal muscles. Scientific Nutrition Discussion

• Preclinical research suggests that MCTs may influence the gut microbiome, improving gut barrier function and beneficial bacterial strains in animal models, hinting at broader metabolic benefits. PubMed, 2023

While these findings are early, they point to potential wider effects of MCTs beyond energy and weight.

Quotes from Experts & Research Summaries

“MCT supplementation was associated with improved indices of memory function in non-demented adults, particularly working memory.” — Systematic review of randomized controlled trials BMC Geriatrics, 2022

“MCT intake increased ketone production and metabolic rate while lowering post-meal blood glucose, an effect preserved even in individuals with obesity.” — Randomized metabolic study PubMed, 2023

These statements can be used to underscore why MCT oil isn’t just a trendy supplement — it has measurable physiological effects documented in peer-reviewed research.

Translating Research into Everyday Use

• Ketones equal energy: Elevated β-hydroxybutyrate supports alternate fuel use in the brain and muscles. PMC Article

• Memory & cognition: Some cognitive domains — especially working memory — may be enhanced by MCTs. BMC Geriatrics, 2022

• Weight & metabolism: Replacing long-chain fats with MCTs may contribute to modest fat loss and metabolic improvements. PubMed, 2015

• Potential new benefits: Early research hints at muscle, balance, and gut effects that may be valuable with long-term use. PubMed, 2023

How to Read an MCT Oil Label

When selecting an MCT oil supplement, look for:

• Clear C8 and C10 percentages

• Coconut-derived MCTs

• No fillers or flavourings

• Hexane-free extraction

• Transparent sourcing

Avoid products that list “MCT oil” without specifying fatty acid composition.

What does MCT oil do?

MCT oil provides a fast, efficient source of energy. It’s quickly absorbed by the body and converted into ketones, which can be used as an alternative fuel to glucose.

Can MCT oil help with ketosis?

Yes. MCT oil can support ketone production, making it popular for people following ketogenic or low-carb diets.

Is MCT oil good for weight loss?

Some research suggests MCT oil may help with appetite control and increased fat oxidation, though results vary between individuals.

Liquid vs powder — which is best?

Liquid MCT oil absorbs faster and allows flexible dosing, while MCT powder is often easier to digest and mixes more smoothly into drinks.

Can I put MCT oil in coffee?

Yes. Adding MCT oil to coffee is common and may provide sustained energy and mental focus without a sugar crash.

Are MCT softgels as effective as liquid?

Softgels offer convenience and portability, but liquid MCT oil allows for easier dose adjustments and faster absorption.

How much MCT oil should I take daily?

Start with 1 teaspoon per day and increase gradually. Many people use 1–2 tablespoons daily, depending on tolerance and goals.

Is MCT oil safe for everyone?

MCT oil is generally safe, but people with medical conditions or digestive disorders should consult a healthcare professional first.

Does MCT oil affect cholesterol?

Research findings are mixed. Some studies show neutral or beneficial effects, while others suggest monitoring cholesterol levels with regular use.

Can I cook with MCT oil?

MCT oil has a low smoke point, so it’s best added to foods after cooking rather than used for frying or high-heat cooking.

Does MCT oil have a strong taste?

High-quality MCT oils are usually tasteless and odorless, making them easy to add to foods and drinks.

Can kids use MCT oil?

MCT oil should only be used by children under medical supervision, particularly for therapeutic or ketogenic purposes.

Is MCT oil vegan?

Most MCT oils are vegan, typically derived from coconut or palm kernel oil. Always check the label to confirm sourcing.

Do MCT powders mix well?

Yes. MCT powders are designed to dissolve easily, especially in smoothies, shakes, and protein drinks.

Can MCT oil help focus?

Many users report improved mental clarity and focus, likely due to ketones providing a steady fuel source for the brain.

What are MCTs made from?

MCTs (medium-chain triglycerides) are usually extracted from coconut oil or palm kernel oil.

How long does it take for MCT oil to work?

MCT oil is rapidly absorbed, and some people notice increased energy within 30–60 minutes.

Can MCT oil cause digestive issues?

In large amounts, it may cause stomach discomfort or diarrhea. Starting with a small dose helps reduce this risk.

Is MCT oil good for athletes?

Athletes may use MCT oil for quick energy, though it works best alongside a balanced nutrition plan.

Does MCT oil break a fast?

Technically yes, as it contains calories, but many people use it during intermittent fasting to support energy and ketone levels.

Can MCT oil be taken on an empty stomach?

Yes, but beginners may prefer taking it with food to avoid digestive discomfort.

What’s the difference between MCT oil and coconut oil?

MCT oil is a concentrated source of specific medium-chain fats, while coconut oil contains a mix of short-, medium-, and long-chain fats.

Is MCT oil suitable for paleo diets?

Yes. MCT oil fits well within paleo dietary guidelines when sourced from natural plant oils.

Can MCT oil help with blood sugar control?

MCT oil does not raise blood sugar and may support stable energy levels, especially in low-carb diets.

How should MCT oil be stored?

Store MCT oil in a cool, dark place with the lid tightly closed. Refrigeration is not necessary.