5-HTP 100mg (Previously named Happy Days)

100mg 5-HTP with zinc and B vitamins

Only 24p per day 1-2 month supply

"I feel it takes away much of the stress and anxiety I can feel during the day."

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.

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: 4.48 / 5 stars, based on 25 reviews

28 August 2015

Using it - one a day - and no idea what effect I'm getting.

25 August 2015

Not known yet.

25 August 2015

I feel it takes away much of the stress and anxiety I can feel during the day.

24 August 2015


23 August 2015

These tablets have helped me through a very difficult period in my life and help me to keep calm and sleep soundly without waking up and having horrible dreams. I really appreciate the help it has given me.

23 August 2015

Take this for anxiety and panic attacks, very good, great service from healthspan

23 August 2015

After using anti depressants for the last few years with unwanted side effects I decided to come off them and try these instead. I have found they actually work! I'm feeling great for the first time in a very long time. And also I wanted to take them to help ward off my migraines and so far they seem to be working. For me personally, the 5-htp is a wonder cure. Wish I'd found it before

17 August 2015

This product has really helped me through a difficult time after losing my mum.

16 August 2015

Relaxes and helps with sleep

15 August 2015

I find taking them in the winter helps to keep depression at bay & also to sleep better

13 August 2015

Used to be free postage. Disagree with the new charges - think repeat customers should get larger loyalty discounts

11 August 2015

I have depression .and these help alot

08 August 2015

helps to build up the chemicals in my brain lost in infancy

07 August 2015

as above

07 August 2015

Good website, easy to use, very quick delivery

05 August 2015

I have tried other suppliers' 5-HTP and they all do nothing for me. I am just lucky that Healthspan's version is brilliant--it's very effective, working exactly as it should (helps me sleep well, calms overall nervous disposition) and is a great product. Strange, as you would think that the formula would be the same from all suppliers, but clearly it cannot be. Please don't ever stop selling this product!

05 August 2015

did not like the packaging it came to bits on opening

01 August 2015

Use at night. Good for sleep problems

28 July 2015

Mum is trying this out as its worked very well for me & it seems to be doing the trick so thank you.

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.