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5-HTP Capsule - 100mg

High grade 99% pure and naturally sourced 5-HTP

539 reviews9410020
Buy 5-HTP Capsule - 100mg
Only 14.4p per capsul
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Only 12.2p per capsul
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  • Description
  • Product Information
  • Feefo Reviews Reviews

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

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.

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.

Improved super strength vegetarian capsule

As a result of customer feedback we have recently made some improvements to this supplement. It appeared that the tablet-coating could crack and crumble under certain storage conditions, due to moisture absorption, so have changed the format of this supplement from a tablet to a two-piece capsule which has resolved the problem. Please be assured that the active nutrients are exactly the same as before, so if you are a regular customer you will still be buying the same, great supplement, just in capsule form, rather than as a tablet.

Nutritional Information
Each 5-HTP 100mg capsule provides:
L-5-Hydroxy Tryptophan (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 prep (with Maltodextrin), Griffonia Seed 99% 5-HTP, Microcrystalline Cellulose, 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 - 539 customers have independently reviewed and recommend 5-HTP from 539 reviews (showing latest 50 reviews)
Review Date
Review Details
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
Very quick and good quality! Would recommend
Service rating: Brilliant do the job
Product: Taking these for years def do the job for me
Service rating: Muito bom
Product: Rapidez e qualidade e segurança
The package arrived very quickly. Thank you! I am very happy with the cooperation.
Great good value
Service rating: Everything was as expected. The product is cheap and high-quality, and the delivery to Norway was really fast! 5/5 would order again
Product: I ordered 5-HTP and got 5-HTP. The capsules are quite basic, but that's just fine.
Order came quickly
Good fast service at reasonable prices
Service rating: Speedy delivery thank you and encapsulated product
Product: Still a lot of fillers and binders in this encapsulated product and they could not explain the addition of another additive. I find griffonia seed effective at helping me remain asleep to prevent 1.5 hourly awaking.
Service rating: CAME ON TIME . ALLGOOD
Efficient delivery and order service and well packaged. Would definitely use and recommend them in future.
Service rating: sharp
Product: it works and it worth it :)
Service rating: I ordered the vitamins easily online and at a much cheaper price than in stores. They came quickly and easily through the door. All around, a great service!
Product: I take 5htp in the winter to help me regulate my sleeping and moods during the wintertime. I take 2 before bedtime, and perhaps it's the placebo effect or perhaps it's real, but I go into a very restful and deep sleep quickly after.
Service rating: Yes i would buy from them again and recommend them to interested friends.
Product: Sleep problems stress and depression
Your packing staff packed the wrong packet pills.
Feedback Response: Thank you for your feedback. One of our Customer Services team will contact you to make sure this error has been rectified to your satisfaction
Service rating: Excellent, quick and the helpline works!
Product: I only take one if I don't have an early start, but it is really strong and works exactly as it says. My mood is better, possibly because my sleep is so refreshing now.
Service rating: Easy to order & quick delivery.
Product: Easy packaging, light & not bulky.

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