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SUMMER SAVINGS - Save £3 On Your Order -  PROMO CODE: JVCF22A   Min Order £15, Ends 23:59 4th July

5-HTP Capsules - 100mg

High grade 98% pure and naturally sourced 5-HTP

577 reviews9410020
Only 13.0p per capsule
In stock
- Best Price
Only 11.0p per capsule
-10 in stock
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Key features

  • UK sourced, 98% pure 5-HTP
  • Vegan friendly cellulose capsule
  • Supports sleep and mood
  • Good alternative to St John's Wort
5-HTP 100mg capsule view
Capsule Size
19mm x 6.6mm capsule
  • Description
  • Product Information
  • Feefo Reviews Reviews

What is 5-HTP?

5-HTP is converted in the body into the brain chemical messenger serotonin. Serotonin in the brain acts as a chemical messenger and is influences the majority of the cells in the brain, including sleep, appetite, mood and sexual desire.

5-HTP is derived from West African Griffonia simplicifolia tree, the only natural source available, using a specially developed process that retains as much of the active ingredient as possible. The supplement is then encapsulated in a fully vegetarian cellulose capsule, each providing 100mg of 5-HTP (in amino acid form).

Why buy a 5-HTP supplement?

Serotonin is involved in mood, appetite and impulse control, and has an effect on our state of restfulness.

Unlike cheaper Griffonia Seed powder, our UK-sourced material is 98% pure. This means that it only requires 102mg of Griffonia Seed to make our capsules. Some of the cheaper supplements on the market use inferior 70% material so please be aware of what you are buying.

'Peak-X' free

You can also be assured that our 5-HTP is certified to be 'Peak-X' free, and is sourced and manufactured in the UK to GMP quality standards.

Nutritional Information
One capsule typically provides 100mg of 5-HTP (L-5-Hydroxytryptophan)
Allergen Advice
Ingredients containing allergens are highlighted in bold in the ingredients list. 
Cautions / Possible Side Effects
Do not use if under medical supervision without consulting a medical practitioner. Pregnant and/or lactating women should consult their doctor before taking this product. May cause drowsiness.
List of Ingredients
Bulking Agent (Gluten-Free Stoneground Brown Rice Flour), Griffonia Seed Extract, Capsule shell (Hydroxypropylmethyl Cellulose), Natural Rice Extract, Anti-caking agent (Natural Rice Concentrate).
Dosage / Suggested Intake
Swallow one to three capsules per day, 45 minutes before bedtime. Take for 3 months then stop for a month and review.


Legal Category
Food Supplement with Griffonia Seed extract


Customer Reviews for 5-HTP 100mg

The views expressed below are the personal opinion of Just Vitamins customers. Just Vitamins does not endorse these views, nor should they be regarded as health claims or medical advice. All reviews are collected and verified as genuine by a 3rd party called Feefo.

Overall product rating 9.4 / 10 - 577 customers have independently reviewed and recommend 5-HTP from 577 reviews (showing latest 25 reviews)
Review Date
Review Details
Service rating: Delivery was fast, the packaging is really nice (I like the fact its like coffee refill packs rather then the plastic tubs) The product itself is hard to say, mainly because its like taking a multi vitamin, you really can't tell that you are now getting what your body needs. Can say it hasn't hurt me at all, and I have been in a better way but thats a combination of things, eating healthy, exercising, taking extra things that my diet is lacking. However I can say I will be ordering again because I feel the 2 have helped my mood and sleeping (I have major sleeping issues) Hope this helps who ever is reading this.
Service rating: service is good choice of goods decent prices
Product: helps sleep and is a good price
Service rating: Quick accurate service at fair prices. The quality of the vitamins is brilliant & in fact I am just going to order some more
Product: We've really enjoyed being able to wind down easier & have good night sleeps. Very good for calming anyone who has spent too much screen time too.
Service rating: Fast and efficient service
Product: Bought for partner who is suffering from long covid and experiencing low . In addition to a good diet, he has taken these and his mood has noticeably improved...
Service rating: Great product, received in the time for postage. All items are great with the ingredients very easily readable on the website, huge help to when buying products the need to be free from.
Product: Amazing product, helps with fibromyalgia and sleeping, product is free from and the service is great and quick
Service rating: I paid 2.50 for quick delivery but it didn't happen after 8 days I contacted them and they said it had been sent but didn't have a royal mail tracking number and quick delivery is 5 days!!!!
I eventually received them 2 weeks later. They did refunded the £2.50 postage and rightly so But they could have offered me a discount coupon or something for my trouble. So no I wasn't impressed??
Product: I haven't been taking it long enough to know but it seems ok
Service rating: Quick delivery. Great products.
Product: To helo with tiredness. It is helping
I wanted to take a higher dose 5htp and came across yr product, which I am very pleased with. I seem to be sleeping a little longer and deeper
Service rating: Prompt delivery. Have used JV before and will probably use again.
Product: Taking to try to help my sleep pattern. I think they are helping so far.
Quick & Easy
Quick delivery
Very happy with the product & price of just vitamins
Service rating: Very quick delivery, thank you
Product: I started taking these to overcome depression. After a while I stopped them, but realised I still needed them. They do wok.
Service rating: Great product, easy site and very quick delivery
Product: Not used this product before but have just started and have the same benefits as my last at a cheaper price
Service rating: Great value for money and a website I come back to regularly for my vitamins. The 5HTP help me sleep well and I can’t find them cheaper elsewhere.
Product: I’m taking these to help me sleep and they really work. I wake up feeling refreshed and awake
Service rating: Efficient delivery, quality product
Product: Good quality product, helps keep my mood lifted
Service rating: Always a good and reliable company. I've used them for years for my 5HTP and am very pleased with the product, packaging, swift delivery and offers.
Product: I've used this for years and have not had a depressive episode for 11 years. It has changed my life, literally.
Service rating: Quick, efficient, a quality product at a reasonable price.
Product: Quality product, have a lack of serotonin
Service rating: excellent service all round
Product: help sleep well every night
Service rating: Prompt service at reasonable prices. Will use again.
Product: Helps with sleep issues..
Service rating: fast delivery, good communication, good products, overall a fantastic retail service
Product: To help boost mood levels and aid sleep pattern development, they do the job perfectly
Service rating: Good delivery service.
Product: I use 5-HTP supplement on a regular basis to control a mild anxiety and it really helps me to feel calmer and to relax before going to bed. This is really a good product.
Service rating: As always excellent service. Prompt delivery.
Product: I’ve only been taking it for a few weeks to help with evening my mood and helping me sleep.
Service rating: Just Vitamins have a wide range of useful, high quality products at reasonable prices.
Customer service is helpful and delivery is prompt.
Product: Has some effect at helping you to sleep.
Excellent Product, excellent service. would highly recommend

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