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60 Tablet Blister Pack - buy 5htp 100mg
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5HTP 100mg | High Strength

star ratingstar ratingstar ratingstar rating  4 out of 5  | 14 product reviews
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60 Tablets - B575

Blog FAQ's


5 HTP Tablets


  • Support the production of serotonin
  • Serotonin helps to regulate mood
  • Premium quality Griffonia Simplicifolia
  • Suitable for vegetarians


What is 5-Hydroxytryptophan?

5-Hydroxytryptophan (5 HTP) plays an essential role in the body’s production of serotonin, which is an important chemical messenger in the brain. It may also play a key role in the body’s synthesis of melatonin. Although the body naturally makes 5 HTP from the amino acid Tryptophan, dietary sources can help to supplement the body’s production.


Serotonin and Mood

We live life at a demanding and challenging pace, which can take its toll on our bodies and serotonin levels. Serotonin is involved in mood, appetite and impulse control, and has a direct effect on our state of restfulness and restlessness. Because of this, serotonin is fondly referred to as the “happy hormone”.


Super Strength 5 HTP Supplement

Our Super Strength 5HTP 100mg tablets have been formulated to provide a safe and effective level of this essential amino acid, based on strengths used in successful clinical trials. We have spared no expense in sourcing premium-quality extracts from the West African plant known are Griffonia Simplicifolia, which are then produced in the UK within GMP quality approved facilities. Buy 5HTP today.

 Nutritional InformationPer tablet% NRV
 5-HTP 102.05mg Griffonia Seed 98% Extract
 NRV = Nutrient Reference Value (previously referred to as RDA)
 µg = Microgramme, mg = Milligram, IU = International Units

Other Ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, Silicon Dioxide, Magnesium Stearate. 


Suggested Daily Intake:
Take one to three tablets daily. Start on one tablet and increase if necessary. Take one hour before bedtime as a food supplement or as directed by a healthcare professional.


If you are taking any prescription medication, you have a medical condition or you have specific concerns about the suitability of our products, always consult your GP or Pharmacist prior to taking supplements. Do not exceed stated dose. Store in a cool dry place. Keep away from children at all times. Do not use if seal is broken. Pregnant or lactating women should consult a Doctor before using this product. Suitable for vegetarians. Image is for illustration purposes only. Food supplement: This product should not be used as a substitute for a varied diet. Always read the label before use.


UK Mainland


STANDARD: FREE 2-day tracked delivery for all online orders.

All orders dispatched to UK addresses will automatically qualify for FREE Standard 2 Day Delivery, regardless of order size. This means you won't be waiting long for your goods to arrive. Order before 12.30pm Monday-Friday to receive goods within 2 working days (excluding bank holidays). 


EXPRESS: FREE next-day delivery for orders over £70.

Place your order before 12.30pm Monday-Friday to receive your goods the next-working day (excluding bank holidays). For orders under £70 there is a small £5.25 charge for Express Next Day Delivery.


Track your order

All orders dispatched to UK addresses can be tracked. Simply follow the link in your dispatch confirmation email to locate your parcel. If you encounter any problems please call our freephone number 0800 988 0292 to speak to a customer service advisor.


Europe & Rest of the World

For all European and International orders, delivery charges will vary depending on the total weight and size of the order. As you add products to your basket the delivery charge will automatically update. This service offers all our international customers fair and competitive delivery charges.


Terms & Conditions

Orders must be placed before 12.30pm Monday to Friday (excluding bank holidays) to qualify for our Express Next Day Delivery or Standard 2 Day Delivery. These services are currently available for UK addresses only and are subject to stock levels. If an item(s) is out of stock, it will be given priority delivery upon arrival.


Please Note: The views expressed below are those of Simply Supplements customers. Simply Supplements does not endorse these views, nor should they be regarded as medical advice.

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    25th Jun 2014
    Hate waking up in the mornings! 
    Emilius Brown, London
    I have bought these a couple of times before I switched to 5-HTP patches, and found them to be really good for helping me to get out of bed, especially during the darker months of the year. I would definitely recommend these for people who prefer taking 5-HTP in tablet form.

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    5th Nov 2013
    low mood 
    Missi, Kent
    I have been taking these 5HTP tablets for a while and I would highly recommend this to anyone. I have found my low mood, anxiety and depression has improved in a short space of time. I wish I had found these earlier. The best time to take these is a couple of hours before bed time. Great product, definitely worth the money!

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    2nd Feb 2013
    West Midlands 
    Kashmir Kaur Dhothar, COVENTRY
    My yoga teacher bought for me to rid off my stress and sleeping problems,i recommened to all,works very quick and easy to take,good product.

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    28th Nov 2012
    Bad moods  
    Lauren Davies , Machynlleth
    I take 5HTP for my awful mood swings and since taking 1 tabet a night for about 5 weeks my moods have gona and im preety sure im more pleasent to be around now too

  • 4 stars4 stars4 stars4 stars

    Reviewed on
    27th Nov 2012
    severe mood swings 
    Annie Richardson, York
    I had been suffering with severe mood swings and a pharmacist recommended trying Evening Primrose Oil and this 5HTP. Since taking the two together they've really helped me and feel more calm and relaxed. I will continue to take these as have been a massive help to me.

  • 4 stars4 stars4 stars4 stars

    Reviewed on
    27th Nov 2012
    low mood 
    paul, teignmouth
    Used to take st john's wort but this has been much better. have less self doubt, greater confidence and more zest for life.

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    23rd Oct 2012
    Replacement for St Johns Wort  
    Louise Evans , Rhymney
    I have been taking st johns wort for a while and when i came online to place my next order for it and couldnt find it i rang one of your advisors who told me that you had stopped supplying it but it had been replaced with 5HTP so i thought i may as well try and its actully better then the st johns wort. My bad moods have almost completely gone i wish i had found this product sooner

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    28th Sep 2012
    lisa , dawlish
    I have been taking a new contraceptive pill for my acne and I found that I "snapped" at things that were very trivial. I didn't want to stop the pill as I now have perfect skin! I researched mood enhancers, st johns wort was ruled out as it affects the pill, so I gave 5htp a try. Within a few days I felt so much better, this continued so I wondered whether maybe it was a placebo effect? So I stopped taking it and within 3 days I felt low and angry about things that I shouldn't have. It has made my sleep better too.

  • 4 stars4 stars4 stars4 stars

    Reviewed on
    28th Aug 2012
    Works just as well ... 
    Gemma Apostilakis, Wolverhampton
    I used to have these with St Johns Wort which worked very well. Now you only provide 5-HTP on its own and it works just as well as the combination you used to have. I use this becuase of mood swings due to menapouse and have helped me to cope very well.

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    17th Aug 2012
    Healthy mood, Healthy diet. 
    Sharon, Lancashire
    I was gaining weight due to low moods making me eat. After reading the reviews and information on 5HTP I gave it a try, just to see if it could brighten me up a bit. Not only has my mood lifted but my food intake has decreased as a result. Thank you for this!

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    10th Jul 2012
    Sleeping like a baby! 
    Mark Scott, Scunthorpe
    My restless sleeping has practically stopped now after taking 5HTP, and a good nights sleep is improving my mood, so daily tasks are a lot easier to manage. Prefer taking this product to pharmacy medicine, and its a lot cheaper than constantly stocking up on sleeping pills!

  • 5 stars5 stars5 stars5 stars5 stars

    Reviewed on
    20th Apr 2012
    Sergio, London
    I have had many stresses over the past year and bought these to help me as I hadn't been able to sleep. Now I feel more calm and relaxed and many things don't worry me like they used to. Very Good, Gracias SS.

  • 4 stars4 stars4 stars4 stars

    Reviewed on
    20th Feb 2012
    Sleepy Head 
    Mrs June Webber, Hartlepool
    I'd been having trouble sleeping and nothing was working for me and it was causing me all sorts of problems. I recently purchased this from you and have noticed a difference already. Will need to keep taking for better results but so far I feel less tired.

  • 4 stars4 stars4 stars4 stars

    Reviewed on
    17th Feb 2012
    Great Replacement Product 
    Sebastian Lindberg, Bristol
    I remember ordering L-Tryptophan from you for my wife but rcvd this 5-HTP. I called to check and was advised this is a replacement. My wife has found these to be a big help already and her mood has improved greatly, Great replacement.

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  • 27th December 2014 - Nicky
    Q: Is it best to take 1-3 tablets at once, or spread out throughout the day?
    A: We would recommend the take the tablets separately during the course of the day. This should help keep the supplement absorb into the body at a steady rate for optimum effect.
  • 26th November 2014 - Tara
    Q: Can I take 5-HTP with Menopol plus? My mood has been pretty low for months now. I'm just not happy...about anything. I'm guessing this is part and parcel of being perimenopausal. Thanks
    A: Our 5-HTP and our Menapol Plus supplements are safe to be taken together. If you require any further advice or would like to try any alternative products in the future, please feel free to contact where one of our advisers will be happy to assist you in selecting a suitable product.
  • 30th August 2014 - Kerri
    Q: Are these still available in the plastic tubs rather than the blister packs? When I previously bought these they came in little pots of 90 now it appears they are only available in blister packs of 60 which makes them more expensive in comparison.

    A: We have introduced our blister packs as a trail due to a high amount of feedback from our customers, however i will pass your comments on to the relevant department.
  • 26th August 2014 - CAMPBELL
    A: 5HTP would be something we would certainly recommend for somebody who feels stressed or anxious whilst flying, however as supplements work differently for each individual person we cannot guarantee and specific results.
  • 10th April 2014 - Joy
    Q: can you take 5-HTP along side HRT -Elleste Duet?
    Many thanks,
    A: The only warning we are aware of is that 5-HTP may be unsafe in pregnancy and breast-feeding. However, we would advise that, for safety reasons, we ask that you consult a pharmacist or GP to avoid possible side effects from taking both preparations at the same time.
  • 14th January 2014 - Sean
    Q: Are these suitable for vegans?
    A: Yes, this product is suitable for vegetarians and vegans.
  • 17th November 2013 - Becca

    What time of day is best to take these 5-htp tablets? 


    Many customers who struggle to get a good nights sleep find these 5HTP tablets most effective when taken 1-2 hours before bed. Others find them to be beneficial at times of tension or anxiety.

  • 25th January 2013 - Fiona
    Q: Does your 5HTP contain any other vitamins? Or is it just 5HTP? Some suppliers of 5HTP seem to add B3 and B6 and C to their tablets. Please let me know exactly what is in each tablet.

    Our high strength 5-HTP tablets contain 100mg of active 5-HTP. They do not contain any other vitamins or minerals. 

  • 30th December 2012 - Kara Uttley
    Q: Can this product be given to a child aged 11 yrs?

    Due to the strength of this supplement, we do not recommend that it is taken by anyone under the age of 16 years old.

  • 9th October 2012 - nikki minter
    Q: Are there any foods, drinks or other supplements you should avoid whilst taking 5htp?

    We are not aware of any foods or drinks that should be avoided whilst taking 5-HTP. However, 5-HTP should not be taken in addition to other medications for depression or antidepressant drugs. Unfortunately, at Simply Supplements we are not medically trained. Therefore, if you are taking any prescription medications I would advise that you please consult with your GP prior to supplementation with 5-HTP.

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