5-HTP 100mg (Previously named Happy Days)

100mg 5-HTP with zinc and B vitamins

£2 OFF Only 20p per day 1-2 month supply

"Always quality products and service, every time. I always recommend Healthspan as they are reliable and their products are first class. The website gives excellent details eg suitable for vegans, which you don't seem to get elsewhere. I wouldn't buy from anywhere else."

60 Tablets
Now £11.95 was £13.95

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.

Save time and money with our Repeat Order Service

Perfect Partners to 5-HTP

These products work in perfect synergy alongside 5-HTP

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: 4.36 / 5 stars, based on 25 reviews

26 July 2015

Always quality products and service, every time. I always recommend Healthspan as they are reliable and their products are first class. The website gives excellent details eg suitable for vegans, which you don't seem to get elsewhere. I wouldn't buy from anywhere else.

19 July 2015


19 July 2015

All Healthspens products are excellent.

16 July 2015

Have tried cheaper brands 5-htp in the past and to be honest haven't noticed any difference in mood also have suffered slight tummy upset while taking. I've been taking the Healthspan 5-htp for couple weeks now and definitely seem to have more energy and not so stressed by pressures in life at minute....also no tummy upsets while taking. I would recommend and will order again ��

14 July 2015

We have always had excellent swift service from Healthspan, however on thus occasion the delivery was very delayed. Perhaps a declining postal service is to blame, how'd re this is something the company will have to figure into their delivery promises.

10 July 2015

Helps reduce the frequency & severity of 'down' moods

10 July 2015

excellent service, too early to tell if the tablets are helping, only been taking them for a few days

09 July 2015

It helps me sleep more easily

09 July 2015

I find this product very helpful

08 July 2015

Helped lift my mood during a very difficult period of family problems.

08 July 2015

Products are expensive

03 July 2015

I found the website very easy to use

02 July 2015

Helps alleviate depression

01 July 2015

I suffer from back pain, i believe taking one each night helps me relax and sleep.

27 June 2015

I have fibromyalgia and have found these to be a great help when combined with the Night Time 5-HTP

24 June 2015

Couldn't be easier.

23 June 2015

Helps with feeling happy

22 June 2015

not yet sure of benifits

18 April 2015

A wonderful serotonin booster, helps me sleep well too

12 April 2015

Seem to work but it's a bit early to see the benefits.

11 April 2015

Why can't you deliver all ordered Products at the same time in the same carton ? Like mentioned, we are often on Journeys and so happened, that only a part of our order is arrived, before our departures. The rest is coming sometime. Your Delivery-Conditions (within of 21 days) are hardly understand - for us at least.

05 April 2015

Can't comment yet as have to be weaned off prescription anti depressants before starting on the 5-HTP.

31 March 2015

Great company