5-HTP 100mg (Previously named Happy Days)

100mg 5-HTP with zinc and B vitamins

Only 25p per day 1-2 month supply
60 Tablets

5-HTP 100mg (Previously named Happy Days)

60 Tablets

Key Features

  • A natural way to boost serotonin levels and increase your levels of 5-htp
  • Contains vitamin B3, B6 and zinc to support normal psychological and neurological functions
  • One of our top selling products, receiving a 5 star review rating

Product Overview

  • Suitable for Vegetarians
  • Suitable for Vegans
  • Gelatin Free
What is 5-HTP? 

5-Hydroxytryptophan, more commonly known as 5-HTP, is is derived from the amino acid L-tryptophan. 5-HTP is converted in the body into the brain chemical messenger serotonin. Serotonin is a neurotransmitter; it helps send messages from one part of the brain to another. Serotonin influences the majority of the cells in the brain, including sleep, appetite, mood and sexual desire. 

Why Healthspan's 5-HTP?

Healthspan's 5-HTP 100mg is one of our most popular supplements, receiving a 5 star review rating. Each tablet contains 100mg of pure, natural 5-Hydroxytryptophan along with other important nutrients including vitamin B3, vitamin B6, vitamin C, zinc, folic acid and biotin. These nutrients have been included for their numerous associated benefits, none more so than vitamin B3, B6 and zinc which support normal psychological and neurological functions.

Also the 5-HTP used in Healthspan’s 5-HTP 100mg is sourced exclusively from the seeds of the West African Griffonia simplicifolia tree, the only natural source available. 

Alternatively if you are looking for a natural sleep aid why not try our Night Time 5-HTP (previously named Sweet Dreams)

Read more

Product Information


Initially one tablet daily, increasing to a maximum of three daily if required. Use for three months, stop and review

Key nutritional values

Typical values, % NRV (where applicable) in brackets:

L-5-Hydroxytryptophan (5-HTP) 100mg
Vitamin B3 30mg (166)
Vitamin B6 2.8mg (200)
Vitamin C 80mg (100)
D-Biotin 50mcg (100)
Folic Acid 100mcg (50)
Zinc 5mg (50)


Bulking Agent: Maltodextrin, Griffonia Seed Extract (5-Hydroxytryptophan), Vitamin C Prep. (Ascorbic Acid, Hypromellose), Bulking Agent: Microcrystalline Cellulose, Nicotinamide, Coating (Hypromellose, Titanium Dioxide, Glycerin, Iron Oxides), Zinc Citrate, Stearic Acid, Anti-Caking Agent: Silicon Dioxide, Magnesium Stearate, Pyridoxine Hydrochloride, Folic Acid, Biotin.

Not suitable for pregnant or lactating women. May cause drowsiness; do not drive or operate machinery if affected. If you are taking any prescribed medication or have any medical conditions always consult your doctor or pharmacist before taking vitamins or supplements. Keep out of sight and reach of young children. Do not exceed stated recommended intake. Food supplements must not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Store in a cool, dry place. If you experience an adverse reaction, stop taking the supplement and seek medical advice.

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Independent Reviews for Happy Days® 5-HTP Tablets

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

Overall Rating: 4.52 / 5 stars, based on 444 reviews Below you can find the latest 25 reviews. To access the full list please click here

24 October 2016

Difficile da valutare; per qualche anno ho trovato giovamento, ultimamente però, gli ho attribuito causa d'insonnia ed ho interrotto il "trattamento" di una dopo cena.
Mi riprometto di provare ancora più avanti.

22 October 2016

Great product that really works.

Thank you for your review - We are happy to hear the product is working for you.

Shaun Slaymaker

21 October 2016


17 October 2016

These have helped me sleep better on a night. I have been taking them on a night and St. John's wort in a morning and together they have definitely improved my mood.

16 October 2016

gut verträglich und hilft

11 October 2016

Very good helpful product

It's great to hear you are pleased with the products - Nicola

03 October 2016

Only noticed a difference when taking the maximum dose stated (three tablets a day). The tablets are quite large to be taking three of them.

This makes them a more expensive alternative to prescription depression medication and so I will not be purchasing again.

26 September 2016


19 September 2016


18 September 2016

I would like to leave a review about 5htp night time and also the normal 5htp. They have changed my life. My husband always says to me " don't ever run out of those" ! I don't like taking prescribed antidepressants so when I found these tablets and they worked I was thrilled, I have one 5htp in the day time and a night time one when I go to bed AMAZING!!! Thankyou Thankyou

18 September 2016


17 September 2016

These work!! Have been using them and recommending them for years!

13 September 2016


13 September 2016

Used this many times before, an excellent product.

12 September 2016


11 September 2016

I take one of these for a few days whenever I feel stressed or down in the dumps - they always help and get me back on track.

09 September 2016


02 September 2016


30 August 2016

I didn't realise it at the time, but with this product be very careful if your are on particular medication from the doctor as mixed with this can cause further health problems. I am also taking amitriptyline for diabetic neuropathy but in a very small dose, but these shouldn't be taken with 5-HTP. Always check with your doctor first as they recommend anyway.

Thank you for comments - A member of our Customer Care Team will contact you shortly.


28 August 2016

I have been using these for about 10 years and a half in the morning keeps my mood raised all day.

28 August 2016