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 418 reviews Below you can find the latest 25 reviews. To access the full list please click here

23 August 2016

När jag känner mig nedstämd och ledsen, tar jag 5-HTP.
Jag känner mig då gladare.

23 August 2016

Just enough to help me have a relaxed sleep, with no after effects in the morning.

22 August 2016

Too early to say if the product is having a positive effect.

22 August 2016


21 August 2016

It gave me a lift in spirits and energy soon after I began taking i.

20 August 2016


18 August 2016

This is the best value I've found for this product.

18 August 2016

Not sure how much these tablets actually help but need to give it more time to see

16 August 2016

Quite special good good good good

It's excellent to hear that you are pleased with this product.

16 August 2016

Great product and I'm certain it's benefited my health.

16 August 2016

My partner takes this because of poor sleep patterns but she still can't sleep well unless I give her a melatonin tablet.

14 August 2016

Very good product, am on second box and then will review and order more if necessary

12 August 2016

These seem better than our previous product and definitely make for a happier disposition

12 August 2016

My husband is on the spectrum with high-functioning Aspergers Syndrome. Without two a day of these tablets his 'glass' is very much half empty and he is hard work to live with due to irritability. With them he is his usual better self and copes with adversity much better.

10 August 2016


10 August 2016

I suffer from anxiety and these are very calming through the day.

08 August 2016

Hard to say whether they are helping as I'm taking these along with St John's Wort and have only just started taking them.

06 August 2016

A better bet than antidepressants and no side effects.Great product.

05 August 2016

Great supplement very helpful

03 August 2016

This product is fairly good, although I buy it for my husband, I think he feels better when he takes it.

Thank you for leaving a review about this item. We are pleased to hear that your Husband is finding it beneficial.

02 August 2016

feel so much better when taking 5HTP and sleep better too.

Thank you for sharing your feedback - It's great to hear how well this product is working for you.

31 July 2016

I have only just started taking them, so hard to review.

29 July 2016

little drowsey may need to return these

27 July 2016

I feel a lot better for taking it.