Seratonin helps support mood and sleep with a standout ingredient and targeted nutrients, a blend from Nutricology's science-focused lineage known for uncompromising quality. A thoughtfully balanced profile supports mood regulation and sleep, while antioxidant and methylation helpers work quietly in the background to help you feel steadier. Star ingredient 5-HTP supports serotonin production, helping mood and sleep, while magnesium and folate aid cognitive function, resilience, and daily stress adaptation to keep you steady.

Available Sizes & Variants:

90 capsules – standard monthly supply for daily use.

Benefits & Features:

• Supports mood balance for daily calm.
• Promotes better sleep quality when taken as directed, supporting restful nights and daytime clarity.
• Star ingredient 5-HTP supports serotonin production, helping mood and sleep, while magnesium and folate aid cognitive function, resilience, and daily stress adaptation to keep you steady.
• Quercetin provides antioxidant support for a healthier brain and nervous system.
• Manufacturing in cGMP facilities with third party testing confirms purity and potency.

Nutricology / Allergy Research Group has built a reputation on science-led formulas and allergen-conscious manufacturing for over four decades. Seratonin centers on the star ingredient 5-HTP, delivering 400 mg per 3 capsules, and pairs quercetin dihydrate with 5-MTHF and essential minerals to support mood, sleep, and cognitive function. The product is made in NSF GMP-certified facilities with third-party purity and identity testing, reflecting the brand's commitment to quality, transparency, and patient safety. For a holistic daily routine, many customers also use magnesium glycinate, a vitamin d supplement, or probiotics.

Other ingredients: Hydroxypropyl methylcellulose, microcrystalline cellulose, L-leucine.

• GTIN: 713947760202
• Manufacturer: Nutricology
• Categories: Allergy Research GroupNew ArrivalsNutricologyPopular Supplement Brands
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take 3 capsules every morning with food as a dietary supplement. You may take more capsules during the day or evening, according to your healthcare provider's advice. Consult your doctor if you're on antidepressant or antipsychotic medications. Take one capsule at the beginning of each meal. More capsules may be taken as desired. Capsules may be opened and contents mixed with food or beverage.

Please consult the product packaging for accurate instructions on how to use the product.

The Active Ingredient Is: 5-HTP (5-Hydroxytryptophan)

5-HTP is a naturally occurring amino acid derivative you take as a supplement to support neurotransmitter function. It is the main active ingredient in this product formula aimed at influencing serotonin pathways and related cognitive and mood processes.

This formula centres on 5-HTP as the core ingredient, with other nutrients included to support overall metabolic and antioxidant needs that come with serotonin synthesis and neural function.

What Does 5-HTP Do?

5-HTP supports serotonin production, which helps with normal mood regulation and sleep-related processes. This lines up with general guidance on neurotransmitter function and metabolic support from EFSA- and NHS-informed explanations of daily physiology.

Supporting nutrients in the blend help with pathways involved in methylation and antioxidant activity, helping maintain healthy neural metabolism and energy balance in daily life.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Nutricology / Allergy Research Group is Welzo picked for their long-standing commitment to evidence‑led formulation and uncompromising quality. With more than 40 years in the industry, this brand is famed for science‑driven concepts and allergen‑conscious products, a reputation repeatedly recognised by integrative health professionals. Our physicians and nutritionists assessed their credentials and highlighted the brand’s consistent emphasis on rigorous testing standards and transparency in sourcing and formulation. This brand’s manufacturing philosophy focuses on purity and potency, supported by production in NSF GMP‑certified facilities that meet current Good Manufacturing Practice requirements, along with third‑party testing for raw materials and finished products. For Welzo customers, this turns into confidence in label accuracy and ingredient integrity, supported by ISO certification and clear ingredient disclosure. This brand was evaluated by our clinical team for compliance with our ingredient quality and purity standards.

Selecting Nutricology / Allergy Research Group over rivals reflects our rigorous vetting process that prioritises longstanding heritage, clinical credibility and robust manufacturing controls. This makes the brand especially well suited for Seratonin, aligning with our commitment to premium quality and consumer safety while providing product‑specific fit for mood and sleep supports.