Name: 5-HTP
Brand: Ethical Nutrition
SKU: 3260
Price: 23.99 GBP
Availability: InStock

Ethical Nutrition 5-HTP benefits infographic

Ethical Nutrition 5-HTP supplement features infographic

60 Capsules | 30-day supply

Vegan 5-HTP to support mood, relaxation and restful sleep.

✓ Mood ✓ Sleep ✓ Relaxation

30 Day Money Back Guarantee

"5-HTP works wonders for me. My sleep has improved within 2 weeks. Happy!"

Verified Trustpilot Review

Support your sleep cycle, mood, appetite and more with our naturally derived 5-HTP (5-hydroxytryptophan). Extracted from responsibly sourced Griffonia simplicifolia seeds, our 5-HTP provides natural assistance for serotonin and melatonin production to optimise mood, sleep, and mental wellbeing. Each dose delivers 200mg of 5-HTP with no artificial additives or fillers, just pure ingredients for maximum effectiveness.

2 capsules provide:

Ingredient	Amount
5-HTP (Griffonia simplicifolia extract)	200mg

Ingredients: Rice Flour & Extract (Oryza Sativa), Griffonia Seed Extract (Griffonia simplicifolia), Capsule Shell (Vegetable Cellulose).

Take 2 capsules daily, preferably with food.

For best results, take in the evening to support natural serotonin and melatonin production.

Cautionary Advice

Do not exceed recommended daily intake. If you are pregnant, breastfeeding, taking medication or under medical supervision, please consult your healthcare practitioner before taking any food supplement. Keep out of sight and reach of young children. Food supplements are not to be used as a substitute for a varied, balanced diet and healthy lifestyle. Store in a cool, dry place away from direct sunlight.

At Ethical Nutrition, quality and safety come first—every ingredient, every batch.

Independent Lab Testing
Before any ingredient is used in production, it’s tested by accredited third-party laboratories for heavy metals and microbiological contaminants. Only materials that meet our strict standards move forward to become part of your supplement.

Full Batch Transparency
We believe in clear, honest communication. That’s why we share a summary of the latest test results for every product batch on every product page.

Made to the Highest Standards
Our products are manufactured in a BRCGS Grade AA certified facility and produced under strict Good Manufacturing Practice (GMP) guidelines. These certifications ensure robust controls around cleanliness, traceability, ingredient quality, and packaging.

Exceptional Allergen Control
We follow rigorous allergen management procedures from goods-in through to dispatch. Dedicated cleaning routines, thorough risk assessments, and segregated storage help minimise cross-contamination risks—making our supplements a safer choice for sensitive individuals.

100% Clean Formulas
You won’t find any unnecessary fillers, binders or additives in our supplements. They’re free from GMOs, palm oil, flavourings and the top 14 allergen-containing ingredients (including gluten, dairy, soy, and nuts). All of our products are registered with the Vegan Society.

We do the hard work behind the scenes so you can trust what’s in the capsule.

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50,000+ customers

Rated Excellent on Trustpilot

Collected and verified independently

“Haven't taken it long but it does seem to help with sleep.”

“This product appears to be working for me. Now on my second supply.”

“I will stick to this product and company going forward.”

Why people take it

Support for mood, sleep and relaxation

This simple plant-based formula gives you a clear daily dose, with no unnecessary extras.

Mood support

5-HTP helps your body make serotonin, a key messenger for mood and emotional wellbeing.

Sleep quality

Serotonin can be converted into melatonin, the hormone that helps support your sleep-wake cycle.

Relaxation

A simple option for your evening routine, supporting mood, relaxation and restful sleep.

Appetite regulation

5-HTP is part of the serotonin pathway, research has explored its role in appetite and satiety.

Why Ethical Nutrition

Clean. Tested. Trusted.

The simple standards behind every formula.

Clean.
Every ingredient earns its place. No artificial additives, fillers or binders.
Tested.
Made in the UK to BRCGS & GMP standards. Batch tested for purity.
Trusted
Formulated with nutrition expertise, reviewed with medical oversight and rated excellent on Trustpilot.

Effective Doses

Natural Ingredients

Better Absorbed

What's in the capsule

Every ingredient earns its place

What we put in and why

Focused formula

Just one active ingredient. 5-HTP from Griffonia seed extract.

What is 5-HTP?

5-HTP is a natural compound your body converts into serotonin.

200mg 5-HTP

Each daily dose provides an optimal 200mg of 5-HTP.

Nature, not lab

Extracted from nature, not made in a lab.

2 capsules provide:

Ingredient	Amount
5-HTP (Griffonia simplicifolia extract)	200mg

Ingredients: Rice Flour & Extract (Oryza Sativa), Griffonia Seed Extract (Griffonia simplicifolia), Capsule Shell (Vegetable Cellulose).

Compare the label

What makes ours different

We believe you deserve to know what’s in your supplements.

Ours

Others

200mg active 5-HTP per daily dose

Natural Griffonia seed source

No unnecessary extras

Plastic-free packaging

Good to know

Frequently Asked Questions

Clear answers on the product, subscriptions, delivery and support.

5-HTP stands for 5-hydroxytryptophan. It is an intermediate compound made during the conversion of tryptophan to serotonin [1].

Tryptophan is found in protein-rich foods such as soy beans, cottage cheese, fish, red meat, lentils and seeds.

5-HTP sits one step further along the pathway to serotonin production.

Serotonin influences several functions, including mood, sleep, digestion and appetite. It can also be converted into melatonin, the hormone linked with circadian rhythm and the onset of sleep [2].

Ethical Nutrition 5-HTP is extracted from the seeds of Griffonia simplicifolia.

Research has explored 5-HTP in relation to:

Balanced mood

5-HTP can cross the blood-brain barrier and is also part of the pathway your body uses to make serotonin. This is why 5-HTP has been studied in relation to mood balance and emotional wellbeing [3].

Sleep quality
Serotonin can be converted into melatonin, which helps support circadian rhythm.

100 mg 5-HTP per day found improvements in sleep quality in older adults, alongside changes in gut microbiota composition [4].

Appetite regulation
Some research has explored 5-HTP in relation to appetite regulation and satiety [5].

1. Richard, D.M., Dawes, M.A., Mathias, C.W., Acheson, A., Hill-Kapturczak, N., Dougherty, D.M. 2009. L-Tryptophan: Basic Metabolic Functions, Behavioral Research and Therapeutic Indications. International Journal of Tryptophan Research Mar 23;2:45-60. doi: 10.4137/ijtr.s2129. PMID: 20651948; PMCID: PMC2908021.

2. Szczepanik M. Melatonin and its influence on immune system. 2007. Journal of Physiology and Pharmacology. Dec;58 Suppl 6:115-24. PMID: 18212405.

3. Maffei, M. E. 2020. 5-Hydroxytryptophan (5-HTP): Natural Occurrence, Analysis, Biosynthesis, Biotechnology, Physiology and Toxicology. International Journal of Molecular Sciences, 22(1), 181. https://doi.org/10.3390/ijms22010181

4. Sutanto, C. N., Xia, X., Heng, C. W., Tan, Y. S., Lee, D. P. S., Fam, J., & Kim, J. E. 2024. The impact of 5-hydroxytryptophan supplementation on sleep quality and gut microbiota composition in older adults: A randomized controlled trial. Clinical Nutrition, 43(3), 593-602. https://doi.org/10.1016/j.clnu.2024.01.010

5. Ioannou, S., & Williams, A. L. 2016. Preliminary fMRI findings concerning the influence of 5‐HTP on food selection. Brain and Behavior, 7(1), e00594. https://doi.org/10.1002/brb3.594

Choose the subscription option before adding the product to your basket, then select how often you want it delivered. For 5-HTP, the current subscription options show delivery every 30, 60 or 90 days. Your payment details are stored securely and you are charged for each repeat delivery unless you change, pause or cancel before the next order is processed.

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5-HTP