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: 4.5 / 5 stars, based on 25 reviews

31 January 2016

Does what it says on the tin

31 January 2016

Improves sleeping quality to some extent and helps with "Feel Good"

30 January 2016

Gives me a boost when run down due to over work!

21 January 2016

Helps with serenity.

20 January 2016

always get a good service and there are so many things to choose from, all explained clearly to make the right choice

17 January 2016

5-HTP helps me relax, at night, having recently undergone spinal surgery

13 January 2016

Superb delivery excellent packaging my no 1 choice of company

13 January 2016

Couldn't be easier great.

10 January 2016

Excellent product and reasonable value for money. No issue's.

09 January 2016

Items always promptly delivered & well packaged.

09 January 2016

Helps with my mood

09 January 2016

I use it to regulate mood and sleep and it's wonderful

05 January 2016

Already started to notice a few a change, used to suffer from brain fog which seems to be clearing.

03 January 2016

To help with my seritoning levels.

03 January 2016

used in conjunction with St johns wort to enhance effect

02 January 2016

Still to see outcome taking this product. As before easy to order

01 January 2016

With experience of depression and as a previous user of anti depressants, I am aware of changes in my moods. Over the past few years I've experienced a bit of a slump during the winter months. After much research I decided to use this supplement to see what difference, if any it made. I've been very pleasantly surprised about how the tablets are working. I've been taking them for about 3 weeks, but noticed an improvement in my energy levels, especially in the mornings and my general 'cheerfulness' after about 5 days of taking the supplement. I find I've also got more patience and am less concerned with little things that might normally bother me. I will continue with the tablets during the winter and am already recommending them to others.

28 December 2015

Taking these means I have the occasional bad migraine instead of one a fortnight

25 December 2015

Good service. Pity they don't sell meletonin!

21 December 2015

not helping yet

We appreciate you taking the time to leave a comment - May we advise that up to three a day of this product can be taken if required and to ensure the break is being taken every three months for optimum results.

Healthspan Customer Care

19 December 2015

Helps in my general health

17 December 2015

As a carer, it maintains my equilibrium throughout the day.

16 December 2015

Too early to tell if the product makes a difference really

15 December 2015

I suffer with depression, I find alternating between 5htp and St John s wort every few months makes a big difference to my mood and anxiety, would recommend.

14 December 2015

Having suffered from very bad migraines for years and tried lots of different products i'd not found anything that helped. I've been taking 5-HTP for approx 8 weeks now and have had significantly fewer migraines!! Yay!