phone number Freephone: 0800 0488 278 free delivery Free express delivery on all orders over £50

5-HTP 100mg

£24.99 £19.99

(13 customer reviews)

Our 5-HTP supplement is 100% natural, and made from the seeds of Griffonia simplicifolia, a plant native to Africa. Each easy to swallow capsule provides 100mg of pure 5-HTP in amino acid form.

Low serotonin can trigger emotional eating, depression, cravings, sleep problems, as well as anxiety. Griffonia simplicifolia is rich in 5-HTP, an essential building block for serotonin production.

  • 1 Month Supply (90 capsules, take up to 3 times a day)
  • Griffonia simplicifolia is 100% natural
  • Suitable for vegetarians.
  • Premium quality (avoid cheap low quality extract from overseas)
  • Manufactured in the UK to GMP standards and ISO9001 quality assurance certification

Product Description

Safety information and side effects reported for 5-HTP

Do not take 5-HTP if you are taking a prescription antidepressant without first consulting your doctor.

No significant side effects have been reported for 5-HTP supplementation.

Our supplement is caffeine free, and does not contain any genetically modified ingredients.

Accept no compromise with Better Nutrition Labs Products

At Better Nutrition Labs we stand behind our mission of providing high quality supplements, featuring premium ingredients and effective formulas.

All our supplements are proudly manufactured in the UK to GMP standards and ISO9001:2008 quality assurance certification.

Same day dispatch for faster world wide delivery to your door

Order before 3pm GMT (Monday to Friday), and we will dispatch your order same day. All other orders are dispatched the next working day.

Our packages are discrete and letterbox friendly for your convenience.

Want to learn more about how 5-HTP works?

Each capsule provides: %NRV
5-HTP (12 mg 8:1 griffonia seed extract) equivalent to 100mg **

*NRV=Nutrient reference value ** = No nutrient reference established

Ingredients: Brown Rice Flour (Bulking Agent), Hydroxypropyl Methylcellulose (HPMC) Capsule Shell (Vegetarian), 5-HTP 8:1 Griffonia seed extract, Magnesium Stearate (Vegetarian) (Flowing Agent). Suitable for vegetarians.

Take one capsule with main meals with a full glass of water

Allergy advice: For allergens see ingredients in bold. This product contains sulfites.

Guidelines for best results:

  • Take 1 capsule with main meals with a full glass of water
  • Do not exceed recommended dose
  • For best results take 2-3 capsules a day on an empty stomach

Start with 2 capsules a day, and allow your body time to start


  • Keep out of direct sunlight in a cool dry place out of sight and reach of children
  • Do not use if inner seal is damaged

Angst J, Woggon B, Schoepf J. The treatment of depression with L-5-hydroxytryptophan versus imipramine. Results of two open and one double-blind study. Arch Psychiatr Nervenkr. 1977;224:175–186.

Attele AS, Xie JT, Yuan CS. Treatment of insomnia: an alternative approach.Altern Med Rev. 2000;5(3):249-259.

Birdsall TC. 5-Hydroxytryptophan: a clinically-effective serotonin precursor. Altern Med Rev. 1998;3:271–280.

Byerley WF, et al. 5-Hydroxytryptophan: a review of its antidepressant efficacy and adverse effects. J Clin Psychopharmacol. 1987;7:127-137.

Cangiano C, et al. Effects of oral 5-hydroxy-tryptophan on energy intake and macronutrient selection in non-insulin dependent diabetic patients. Int J Obes Relat Metab Disord. 1998; 22:648-654.

Cangiano C, Ceci F, Cascino A, et al. Eating behavior and adherence to dietary prescriptions in obese adult subjects treated with 5-hydroxytryptophan. J Clin Nutr. 1992;56:863-867.

Caruso I, Sarzi Puttini P, Cazzola M, et al. Double-blind study of 5-hydroxytryptophan versus placebo in the treatment of primary fibromyalgia syndrome. J Int Med Res. 1990;18:201-209.

Cauffield JS, Forbes HJ. Dietary supplements used in the treatment of depression, anxiety, and sleep disorders. Lippincotts Prim Care Pract. 1999; 3(3):290-304.
Ceci F, Cangiano C, Cairella M, Cascino A, et al. The effects of oral 5-hydroxytryptophan administration on feeding behavior in obese adult female subjects. J Neural Transm. 1989;76:109-117.

Curcio JJ, Kim LS, Wollner D, Pockaj BA. The potential of 5-hydryxtryptophan for hot flash reduction: a hypothesis. Altern Med Rev. 2005;10(3):216-21.

DeBenedittis G, Massei R. Serotonin precursors in chronic primary headache. A double-blind cross-over study with L-5-hydroxytryptophan vs. placebo. J Neurosurg Sci. 1985; 29:239-248.

Elko CJ, Burgess JL, Robertson WO. Zolpidem-associated hallucinations and serotonin reuptake inhibition: a possible interaction. J Toxicol Clin Toxicol. 1998;36(3):195-203.

Freedman RR. Treatment of menopausal hot flashes with 5-hydroxytryptophan. Maturitas. 2010 Apr;65(4):383-5.

Gardner DM, Lynd LD. Sumatriptan contraindications and the serotonin syndrome. Ann Pharmacother. 1998;32(1):33-38.

Iovieno N, Dalton ED, Fava M, Mischoulon D. Second-tier natural antidepressants: Review and critique. J Affect Disord. 2010 Jun 24.

Joffe RT, Sokolov ST. Co-administration of fluoxetine and sumatriptan: the Canadian experience. Acta Psychiatr Scand. 1997;95(6):551-552.

Joly P, Lampert A, Thomine E, Lauret P. Development of pseudobullous morphea and sclero-derma-like illness during therapy with L-5-hydroxytryptophan and carbidopa. J Am Acad Dermatol. 1991;25(2):332-333.

Juhl JH. Primary fibromyalgia syndrome and 5-hydroxy-L-tryptophan: a 90-day open study. Altern Med Rev. 1998;3:367-375.

Mason BJ, Blackburn KH. Possible serotonin syndrome associated with tramadol and sertraline coadministration. Ann Pharmacother. 1997;31(2):175-177.

Meyers S. Use of neurotransmitter precursors for treatment of depression. Altern Med Rev. 2000;5(1):64-71.

Perry NK. Venlafaxine-induced serotonin syndrome with relapse following amitripyline. Postgrad Med J. 2000;76(894):254.

Puttini PS, Caruso I. Primary fibromyalgia and 5-hydroxy-L-tryptophan: a 90-day open study. J Int Med Res. 1992;20:182-189.

Rakel D. Rakel Integrative Medicine, 2nd ed. Philadelphia, PA: Saunders; 2008;47.

Reibring L, Agren H, Hartvig P, et al. Uptake and utilization of [beta-11c] 5-hydroxytryptophan (5-HTP) in human brain studied by positron emission tomography. Pyschiatry Research. 1992;45:215-225.

Ribeiro CA. L-5-Hydroxytryptophan in the prophylaxis of chronic tension-type headache: a double-blind, randomized, placebo-controlled study. Headache. 2000 Jun;40(6):451-6.

Shaw K, Turner J, Del Mar C. Are tryptophan and 5-hydroxytryptophan effective treatments for depression? A meta-analysis. Aust N Z J Psychiatry. 2002 Aug;36(4):488-91.

Sternberg EM, Van Woert MH, Young SN, et al. Development of a scleroderma-like illness during therapy with L-5-hydroxytryptophan and carbidopa. New Eng J Med. 1980;303:782-787.

Toner LC, Tsambiras BM, Catalano G, et al. Central nervous system side effects associated with zolpidem treatment. Clin Neuropharmacol. 2000;23(1):54-58.

Van Praag HM. Management of depression with serotonin precursors. Biol Psychiatry. 1981;16:291-310.

Zmilacher K, et al. L-5-hydroxytryptophan alone and in combination with a peripheral decarboxylase inhibitor in the treatment of depression. Neuropsychobiology. 1988;20:28–33.


13 reviews for 5-HTP 100mg

Please note: The reviews shown below are the independent views of Better Nutrition Labs customers, and should not be regarded as medical advice, and nor do we expressly endorse or support the views expressed here

  1. Leah

    I suffered for years with anxiety and insomnia since hitting the menopause. Tried loads of products and even thought of doing hormone replacement therapy. The only thing I found which really worked for me was 5htp, and for the last year anxiety and insomnia are no longer talking over my life.

  2. Eloise

    Very happy with this product, fast delivery, as well as a handy guide included in the package.

  3. Matt

    Helps keep the mid afternoon munchies at bay, and makes it easier to get a good nights sleep.

  4. DaisyDee

    I was experiencing strong PMDD symptoms which resulted in a swing of irritability, fatigue and downright anger. My doc prescribed antidepressants but after being on these for a few months I didn’t like the idea of being dependent on these. I did some research and tried 5 HTP as the reviews looked positive. I take 200mg a day, and the difference is like night and day, I still get the cramps but my mood doesn’t get in the way anymore.

  5. Nickster

    Great way to take the edge off stress and improve your mood.

  6. Gemma

    Could feel the difference within a week & no side effects would recommend

  7. luca

    Great solution to insomnia or light sleep, no side effects perceived.

  8. M

    Very glad for this product!! It helps alot. And works very fast. It calm downs my mood swings, irritation and helps with my fatigue. One week ago I was out of 5htp and I began to feel more symptoms again and I ordered a new package 5htp.And I´m so happy that I got this product. It helps me.
    Must say I´m also happy with Better Nutrition Labs service. They are really nice and easy to get into contact with.
    I have earlier tried others 5 http not so good.
    This one is really good.

  9. NIKI

    Great product, no side effects at all. Very quick results. I would recommend it definately.

  10. apost

    Better Nutrition Labs 5-HTP is a great help for better sleep, strengthened psyche and the ability to look on the bright side of life in the cold and dark north, Norway.
    The user is very pleased with this product. Therefore, we’ll buy it again. :-)

  11. Maria Gustafsson

    My sleep is so much better now!
    Thank you for the best products!

  12. Helen

    Förstår nu att jag lidit av seretoninbrist i många år, med 5 htp är min oro och ångest borta å jag sover oxå mycket bättre. Bra service från Better nutrition.

  13. S

    Definitely better sleep after the first week of use. I will continue to use this product.

Show reviews in all languages (24)

Add a review

Your email address will not be published. Required fields are marked *

You may also like…

Don't shop without our free health supplements buyers guide

Subscribe to our newsletter to receive our latest findings, member only VIP promotions and our exclusive buyers guide, featuring the 9 most important factors to look for when buying health supplements to actually get results and stay safe.

Join our VIP club and get your complimentary buyers guide today!

Our buyers guide is designed to help you become a more savvy consumer, and help you avoid the dangers of buying supplements which could not only waste your money, but have damaging health consequences.

We take your privacy seriously. No spam ever, see our terms and conditions.

Thank you, your buyers guide is waiting in your email inbox.

Whilst you wait, check out our most popular fat burner.