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5-HTP 100mg Capsule

High grade 99% pure 5-HTP, an alternative to St John's Wort

Buy 5-HTP 100mg Capsule
In Stock
(136 reviews)
  • Naturally sourced - 99% pure
  • Top selling dietary supplement
  • Well researched nutrient
  • Good alternative to St John's Wort
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The body converts 5-HTP into the neurotransmitter serotonin. Serotonin in the brain acts as a chemical messenger.

High strength vegetarian supplement

5-HTP (5-hydroxytryptophan) is derived from Griffonia Seed, 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).

99% pure UK sourced material

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 5-HTP capsules. Some of the cheaper supplements on the market use inferior 70% 5-HTP material, which is much less pure than ours, so please be aware of what you are buying.

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

Improved capsule form

As a result of customer feedback we have recently made some improvements to this 5-HTP 100mg 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 5-HTP supplement, just in capsule form, rather than as a tablet.

Nutritional Information

Each 5HTP 100mg capsule provides:
L-5-Hydroxy-Tryptophan (5HTP) 100mg
  from 101mg of Griffonia Seed Powder

Allergen Advice

This 5-HTP 100mg product is free from:
Gluten, Nuts, Yeast, Salt, Sugar, Artificial Colours Flavours and Preservatives.


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.

Capsule Size

19mm x 6.6mm capsule

Legal Category

Food Supplement

List of Ingredients

Calcium Carbonate prep (with Maltodextrin), Griffonia Seed 99% 5HTP, Microcrystalline Cellulose, Hydroxypropylmethyl Cellulose, Magnesium Stearate, Silicon Dioxide.

Cautions / Possible Side Effects

This 5HTP 100mg product may cause drowsiness.

Do not use 5-HTP if under medical supervision without consulting your medical practitioner.

Pregnant or lactating women should not take 5-HTP without consulting their doctor.

Do not use 5-HTP with antidepressants or other serotonin-modifying agents.

Customer Reviews

98% of customers like and recommend 5-HTP from 136 reviews (showing latest 50 reviews)
Review Date
Review Details
Great delivery service, very fast. Prices competitive against holland and barrett. Would like to see organic superfood for sale
Service Rating : Very efficient good value and quick to deliver
Product : Very good results as yet - I hope this will continue
Service Rating : arrived promptly well packaged.
Product : Could be excellent but haven't used it for long enough to make a judgment,
good price and easy to swallow, so thats a major +
excellent service thank you
Service Rating : Great company very efficient
Product : Great product recommended by a friend and I feel a million times better
Service Rating : great service
Product : great product
Service Rating : Very efficient service
Product : These were recommended by my homeopath and just one per night proved highly effective in combating relatively mild but persistent winter depression. I have recommended them in turn to at least three other people, all of whom have told me they experienced very noticeable benefits.
Service Rating : Very quick delivery
Product : Used as a sleep and weight loss aid
Service Rating : Fast service
Product : Really do the trick but I only take one at night, then the other one or two in the morning. I find I sleep better using them like this
Service Rating : Rapid delivery - thank you!
Product : I am sure the strength of these are spot on as it describes, as in a week of taking JV supps my cloud of depression has finally dispersed.
Service Rating : good
Product : good
Couldn't wish for more
Letter box friendly packaging, very quick shipping.
Could offer pill boxes - 7day am+pm so one could organise a weeks worth of supplements at once and take one am+pm box with you everyday to work.
Service Rating : Good service.
Product : Good reliable service.
Shame that your letterbox shaped packaging didn't fit thru my letterbox :)
Service Rating : Great service & prompt delivery
Product : As described
Service Rating : Fantastic service
Product : Really helps me sleep at night
Service is very fast end good.
Jeg kan ikke finde en eneste ting jeg kan klage over. Gode produkter, flot service, hurtig levering. Super!
Service Rating : Excellent company to buy from. Ordering from the website was easy with a vast array of products to choose from. Service is quick and efficient (product arrived 2 x days later) and the price is very competitive. Thank you.
Product : I have only just starting using the vitamins, so cannot really comment on their efficiency, however, I was so impressed with the overall experience that I have placed another order!!
Service Rating : Fast delivery through the letterbox. No problems.
Product : Good for mild depression and anxiety.
Service Rating : Very rapid delivery
Product : I use them to assist with sleep
Nad producent 5-HTP Perry Little of active ingreedients.
Service Rating : good product, fast delivery, excellent
Product : excellent, sleeping much better, less pain
The "letterbox friendly" container was too big for the letterbox this time, could you possibly split packaging of larger orders?
Service Rating : fgfggrtg
Product : dhdhfrthf
Service Rating : Quick and efficient.recommended to me by a friend.better value than boots and Holland and Barrett where I usually buy
Product : A substitute for st johns wort I have been taking for years.seem to have more benefits.
My order arrived very quickly and was exactly as expected.
Service Rating : Very quick delivery. Excellent value for money
Product : Much prefer this product to hard tablets which tend to crumble.
Service Rating : Fast delivery and through the door too! (no need to collect from post office!!) Good communication too.
Product : Having tried for a couple of weeks, must say they "do exactly what they say on the tin" . Restful nights sleep and refreshed mornings = alert & focused throughout the day.
Service Rating : Very easy to order and great delivery as it's free and just can put through letter box so you don't have to be in.
Product : Yea really good compared to ones from others have had in the past. Cheaper too. Will defo be ordering more from JUST VITAMINS
Service Rating : great vits fast service
Product : great value
Service Rating : Good service received in a couple of days
Product : I have been taking these for a while now for Insomnia, I have noticed a slight change in my sleeping habits but not sure if they are value for money
Service Rating : Excellent service, as relayed in section below - thank you
Product : In fairness, I purchased this product as an aid to sleeping, which I have not noticed any improvement, despite using for three weeks or more now. I am not entirely sure if I should use for longer before any benefit will be noticed, but at the moment I am not convinced that they will do the trick. But the goods did arrive very timely and well packaged and presented, which would make me use this company again, just maybe not this product, which somehow does not seem to work for me. Thank you
Service Rating : Excellent quality capsules, free and quick delivery and I haven't found a cheaper price for the strength.
Product : I have been taking 5HTP supplements for 2 years and they have had a marked effect on the quality of my sleep. I sleep soundly all night and feel refreshed and energised in the mornings, so does my wife as I am less restless in bed!
Service Rating : Excellent delivery speed even through its free and great help when I called up with a query.
Product : I read about 5-HTP tablets being an alternative for St Johns Wort which I have been taking for years and am finding it less available to purchase. Researching why this has happened when I considered it to be a hugely popular product led me to 5-HTP. I took a gamble and tried it and after taking them for 4 weeks now I can safely say that it works as well and I also feel I sleep a little better - a bonus!
Service Rating : good
Product : good
Service Rating : Excellent fast delivery
Product : Have helped me to a good nights sleep again
Service Rating : Good service value for money
Product : Feeling so much better and would rather take these than antidepressants.
Service Rating : Very prompt delivery
Product : I have got these for depression. I used them some years ago and found them very helpful, but I have not used them for long enough this time to assess their effectiveness.
Service Rating : I've used this company many times, they always give excellent service..
Product : I have Chronic Lyme Disease (due to it not being diagnosed at onset) which affects all of my functioning. 5-HTP assists me with relaxing prior to sleep & improving mood throughout the following day
Service Rating : Speedy service and great value, as always.
Product : 5HTP really help me get to sleep. I always have problems `switching off` but these have me asleep in about 20-30 minutes, with no after effects.
Service Rating : Very happy with the free and very quick delivery
Product : I have had trouble sleeping for many years, mainly disturbed so I used to wake up tired. I take these with L-Theanine and they help me relax at night - I sleep very well now and wake up feeling refreshed rather than tired.
Service Rating : Great quick delivery,thanks
Product : I ordered these as I had read other peoples comments and I was slightly skeptical. However even after about 5 days of taking just one before bedtime, I noticed I woke up less tired and have more energy last thing at night too, but still go to sleep well. I also have noticed that I'm not eating as much and less its a bonus
Service Rating : Fast delivery
Product : Good value.
Used to help me unwind and relax at the end of the day
Service Rating : Delivery was good and I was happy with the overall experience.
Product : Sleep after Gym workout
Service Rating : Straightforward website, with superb prices & excellent quality products & the free postage was excellent .
Product : At last I can sleep right through the night & a plus side effect for me is I feel full after a small amount of food, which is great as I need to lose some weight.
I bought some from another supplier before I was referred to Just Vitamins and they didn't work as good & cost me more plus postage.
excellent product and excellent service too
I've only ordered once but the delivery came when it said and I was happy with the product.

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