5-HTP 100mg (Previously named Happy Days)

100mg 5-HTP with zinc and B vitamins

Only 24p 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)


Maltodextrin, Vitamin C, L-5 Hydroxy Tryptophan (5-HTP - Griffonia Seed Extract), Cellulose, Vitamin B3, Coating (Hypromellose, Glycerin - of vegetable origin, Iron Oxide), Zinc Citrate, Vitamin B6, Stearic Acid - of vegetable origin, Silica, Magnesium Stearate - of vegetable origin, Folic Acid, D-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: 4.48 / 5 stars, based on 25 reviews

22 November 2015

Easy to buy from

20 November 2015


17 November 2015


09 November 2015

I started taking this to help with my sleep rather than improve mood etc. and I have to say, it's done both. I only take one tablet before bed and will look to use indefinitely (cycling on and off... remember, no supplements should be taken without a bit of a break unless instructed otherwise by your health care professional).

08 November 2015

I am reluctant to take anti-depressants as I react to them badly and in any case I am afraid of their addictive qualities. Whilst I cannot give a medical recommendation I can say that these tablets greatly relieve the continual cycle of stress which make it hard to break your depression.

07 November 2015


06 November 2015


03 November 2015

good service

03 November 2015

Produce did not improve my mood, and made me feel tried all the time

We appreciate you taking the time to leave a comment - 5-HTP may cause temporary drowsiness in some people when introducing the product therefore, we would suggest taking it with the evening meal for the first two weeks.

We are happy to exchange or refund any unwanted item.

A Customer Care Advisor will contact you directly.

Customer Care Advisor

We must inform you that we are not medically trained at Healthspan. Any health issue that you may be experiencing should be discussed with your GP or Pharmacist before considering the use of any supplementation.

01 November 2015

I sleep better.

29 October 2015

I take these to help as I have Fibromyalgia. Being a vegetarian I have found 5-htp difficult to buy without a gelatin shell. These are vegetarian and the best dosage and price I can find.

27 October 2015

Health benefits

25 October 2015

Removes the need for anti-depressants .
Keeps on even keel

23 October 2015

Having lived abroad for many years we suffer from the gloomy winter weather so taking these tablets for several months lifts our moods during the worst of the winter.

22 October 2015

Great for salep

22 October 2015

All delivered in good time.

21 October 2015

I expect the tablets will take some time to work - I was recommended them for insomnia. They do seem to give me a "lift" shortly after I take them but I wasn't aware I was feeling at all down. I have worked up from 1 tablet to 2 (1 in the morning and one in the evening) but no sleep improvement as yet.

15 October 2015

trying this for the first time for anxiety

14 October 2015

easy to navigate website and order. Speedy delivery and excellent packaging

10 October 2015

made me feel calmer and more able to cope