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APRIL SAVINGS - Save 10% On Everything - Discount Code: JVCD21 Min Order £20, Ends 23:59 23rd April

5-HTP Capsules - 100mg

High grade 99% pure and naturally sourced 5-HTP

556 reviews9410020
Only 11.7p per capsule
In stock
- Best Price
Only 9.9p per capsule
-10 in stock
In Stock

Key features

  • UK sourced, 99% 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 99% pure. This means that it only requires 101mg 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
Each 5-HTP 100mg capsule provides:
L-5-Hydroxytryptophan (5-HTP) 100mg
  from 101mg of Griffonia Seed Powder
Allergen Advice
Any allergens are highlighted in bold in the ingredients list.
Cautions / Possible Side Effects
This food supplement may cause drowsiness.
Do not use if under medical supervision without consulting your medical practitioner.
Pregnant or lactating women should not take without consulting their doctor.
Do not use with antidepressants or other serotonin-modifying agents.
List of Ingredients
Calcium Carbonate (with Maltodextrin), Microcrystalline Cellulose, Griffonia Seed Extract (99% 5-HTP), Hydroxypropylmethyl Cellulose, Magnesium Stearate, Silicon Dioxide.
Dosage / Suggested Intake

For restful sleep, swallow one to three 5-HTP 100mg capsules per day, 45 minutes before bedtime.

Take for 3 months then stop for a month, review, and re-start if required.

Legal Category
Food Supplement


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 - 556 customers have independently reviewed and recommend 5-HTP from 556 reviews (showing latest 50 reviews)
Review Date
Review Details
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
Service rating: All the products I tried till now are very nice and they work as said on the site, affordable prices and also despite to the pandemic problem the deliverys are quite quick.
I'm buying on this site for long now and I'll continue to do it
Product: The supplements are very nice and functional.
I started to buy vitamins and code liver oil, and now for couple of months I'm buying supplements for menopause and can say they're working
Excellent, reliable, as ordered.
No problems with any part of the transaction. Item arrived on time, well packaged.
Service rating: Great service and product!
Product: Good quality, love the new eco packaging too
Service rating: Items recieved quickly and well packaged as usual.
Product: Seems to work as expected.
Service rating: Excellent service, great products.
Product: This stuff keeps me sane!
Service rating: Great product at a reasonable price
Product: Great product at a reasonable price
Great, as always..
Excellent. No problems.
Feedback Response: Thank you very much for taking the time to review us, however your very positive comment doesn't seem to match up to the 1-star rating that you gave us! Would you be able to review your star rating? Thanks.
Service rating: Consistent service quality with excellent customer support.
Ive tried other but always return, especially when receiving a voucher ;)
Product: These taken before bed time regularly help sleep quality, ive tried stopping but feel so much better in myself when taking them. Definitely less short tempered with the kids!
Service rating: Speedy service and well priced vitamins. Especially pleased that the capsules are veggie friendly too!
Product: Fab price and veggie friendly capsules.
Enkelt att beställa med snabb leverans.
Service rating: good product good deliveries
Product: helps me sleep better than without it
excellent fast service
As a long time customer I am very pleased with all my purchases and the terrific service I receive.
Fast service, great customer service!
Service rating: Their delivery is always rapid and precise. Just Vitamins is my go to company when I need something/ The cost is very competitive and usually cheaper than any "sale" from any other online company.
Product: Cheap cost and rapid delivery as al. My go-to site.
Service rating: Always a good service from this company - have used them for years and they are reliable.
Product: This is the best 5-htp I have tried; wouldn't buy any other brand.
Service rating: Fast delivery and excellent quality products
Product: Has definitely improved my mood after taking one a day for around 2 weeks, sleeping pattern has improved too!
Service rating: Excellent products, price and delivery
Product: Awesome product for a good price
Service rating: Yes I would recommend the Star Flower caps & Vitamin C tabs.
They both help my skin & since I don't eat fruit, I need to take Vit C daily.
Product: I'm afraid they haven't worked on me, I take 2 caps before bedtime, as I suffer from lack of sleep. It's been 4 weeks to let them absorb in my system but unfortunately nothing happened to improve my restless nights & anxiety....
Service rating: Nemt at bestille... Hurtig levering.
Product: Nemt at bestille.... Hurtig levering.
Service rating: Delivery was quick which I find important & I like the sachets which post through the door.
I would have liked the option of ordering one bottle the first time & two sachets though, so I could refill the labelled bottle.
Product: Still early days yet, but hope they help with anxiety & sleep. Recently had a virus so I’ll need a month or so to see full effects.
Service rating: Very happy with all my purchases, arrived quickly and now in packaging that can be recycled.
Product: Great product. Helps with my moods, keeping me feeling happier. Definitely works for me.
Service rating: Good communication and fast delivery
Product: worked as described
Service rating: I've been using Just Vitamins for a long time now. Their product is good; I use 5HTP to keep depression at bay and it works for me (I also take L Tyrosine to keep dopamine levels up.)
The service is always swift and they're flat packed so go through the letter box. Competitively priced too. They're a good company!
Product: I've already written what I think .
Excellent service
Prompt & east to use
Service rating: Great Product, great price
Product: .
Service rating: Fast and reliable
Product: Cheapest deal for real 5htp
Service rating: The HTP-5 tablet functioned well during my trip to China.
Product: Using the tablet made us sleep well during our trip.
Service rating: Excellent service easy to order high quality products very quick delivery to Spain many thanks
Product: Very good quality product does as it says been using for a while definitely helps
Service rating: Took a couple of weeks, but less anxious & sleeping better
Product: Great for getting sleep & mood pattern back into sync. Takes a couple of weeks to feel it working.
Service rating: Free and efficient delivery.
Good product information
Product: I don't seem to have as many down days when taking 5htp
Service rating: good product delivered promptly
Product: good product at a reasonable price
Service rating: Arrived in two days, good delivery speed! Only thing is that they package the inside with somekind of fiber material that goes everywhere when you tear it!
Product: I'm taking 5-HTP for insomnia, I take 100mg before I go to bed and so far, it's not only helped my sleep, but it also gives me deeper dreams, I never normally remember by dreams!
Service rating: Good value for money with fast delivery. I ordered from RoI will definitely use this website again.
Product: Great product great service thanks
Service rating: The service was very good .
Product: I was sick every time I took them ,I took them for a week but had to stop ,I was hoping they would help with anxiety.
Service rating: Snabbt, billigt!
Product: Snabb lev. Bra pris. Bra info.
Service rating: These are a good product.... unfortunately there were issues with postage.... I personally think they help to to sleep better... I would order again
Product: Liked product when it finally arrived
Service rating: Faster than expected delivery to a foreign country with bad postal system, testament to their speedy despatch. Product does exactly what it's supposed too. good contact throughout the process.
Product: does what it says on the tin (or in this case, bag).
Service rating: Great prices and fantastic customer service
Product: Great quality product - 5 stars
Service rating: Excellent
Product: Good Thanks very easy to take.
Service rating: Good price fast shipping

Just Vitamins are professionals in E-commerce

I strongly recommend shopping your dietary supplements here
Product: I have eaten 5 htp for five years to o from, works excellent drinking less and less stress
Service rating: Very happy thank you.
Product: Satisfied with purchases.
Service rating: Prompt delivery just what I ordered
Product: Seem to be working. I was prescribed antidepressants by the doc but wasn’t what I wanted to be on these seem a good alternative

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