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

  • Gluten Free
  • 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: 4.51 / 5 stars, based on 358 reviews Below you can find the latest 25 reviews. To access the full list please click here

15 May 2016

A product that I consider gives me a benefit at present

10 May 2016

Recently started using these so too early to decide

07 May 2016


04 May 2016

I suffer regular migraines and heard that 5-HTP can help prevent these for some people. Since taking Healthspan's 5-HTP I haven't had a single migraine so I am very pleased and will continue to buy these from Healthspan.

26 April 2016

For anyone who suffers from migraine these are a must try. Mine have reduced from 12 - 14 days a month to maybe 2!!
They took about 10 days to work originally but since then my quality of life has improved significantly. Better than anything the doctor has ever prescribed for me.

21 April 2016

Have been using these for a year and recently, when I stopped, I found my mood deteriorating. No side effects

07 April 2016

Very good and certainly boost your mood no need for antidepressants!!

03 April 2016

I can always rely on these tablets to get me through the difficult times in my life without having to take anti depressants. Thank you.

30 March 2016


27 March 2016

I really think this makes a difference.

23 March 2016


19 March 2016

Not taken long enough to review.

Thank you for your feedback - We hope after using this product for a little longer you are happy with it's benefits.

19 March 2016


12 March 2016

Would have preferred discreet packaging apart from this perfect

11 March 2016

Just started with them, jury out..

10 March 2016

Healthspan is always reliable in terms of the product, information about the product, delivery and after care if needed. I won't consider anyone else.

08 March 2016

I take these when things are getting on top of me and stopping me sleeping. So far they have worked very well and made me more able to cope.

03 March 2016

perfect x keep doing what you are doing

01 March 2016

These tablets help me through the winter months, keeping my mood up.

29 February 2016

I believe it has improved my feeling of well being