5-HTP 100mg (Previously named Happy Days)

100mg 5-HTP with zinc and B vitamins

Only 27p 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: 4.5 / 5 stars, based on 471 reviews Below you can find the latest 25 reviews. To access the full list please click here

07 December 2016

Pretty unique product. Thank you.

06 December 2016

I'm finding this product very effective.

06 December 2016

Energy and mood improved đŸ’„

We are pleased to hear you are happy with the product.

03 December 2016

Bought for my husband who is trying it and is already sure it works.

02 December 2016

Have not tried them yet but im sure they will be fine

We would recommend this product be taken for a minimum of 6 to 8 weeks, however maximum benefits may not be obtained until at least 3 to 4 months of continuous usage.


02 December 2016

Used by my husband and I for different reasons. Literally a life saver in the winter months. Sceptics give them a go.

Thank you for your comments -

It's lovely to hear how well the product is working for you and your husband.


01 December 2016

I find 5-HTP an invigorator, especially when taking with my breakfast

01 December 2016

Not Shaw if they do any good probably won't buy again

Thank you for your feedback.

26 November 2016

excellent product, good delivery, product I can trust

25 November 2016

Took these for the last 5 nights however have made me extremely tired, especially when I first wake up. Think i'll have to stop taking them as not really felt any improvement in mood either. Disappointed as really thought these would help with my pms but no such luck!

You may wish to call our free phone number where one of our Product Advisor's will be pleased to advise you on an alternative product which may be of benefit.


21 November 2016


21 November 2016

This is a superb product, it really helps me sleep, and with the addition of magnesium and zinc I wouldn't be without it.

Thank you for your review, we love to hear how satisfied you are with the product.

20 November 2016

Have been using for years. see me through the winter without any "blues"

20 November 2016

Have not taken yet as I have no idea whether its wise. I know there are Herbal remedies that must NOT be taken with Doctor's medication but I am struggling with 5-HTP. One user said "Don't take with Amiltryptiline(excuse spelling)" otherwise Doctor/Pharmacy are unable to tell me. Healthspan - you should be telling us the No-No's. Ask your doctor is fine when its combination but surely there are some that are totally no - no. I know St John's Wort must NOT be taken with blood thinners and Statins but as yet no-one can tell me about 5-HTP so its sitting in the draw until someone says its OK

Thank you for your review - We are not medically trained at Healthspan and would advise you consult either your GP or Pharmacist. As a food supplement company Healthspan are unable to offer medical advice.

Sarah B

16 November 2016

These seemed to help me when used previously, I'm sure if they're having the same effect this time around.

Thank you for your feedback - It's great to hear you are pleased with the products - Nicola

11 November 2016

Fair enough they have a disclaimer on the pack to consult your GP as do all Healthspan supplements. But this particular product is almost more of a drug than a supplement. Research first as it can react badly with some prescription anti depressants. I took one tablet and felt unwell so I did the research after which I admit wasn't the right way to go, however I take several supplements with no adverse reaction. My GP has subsequently told me I shouldn't take this product.

Thank you for your  review. We are not medically trained at Healthspan  so would always advise customers who are taking prescription medication to first check compatibility with their G.P or Pharmacist before taking any of our supplements. If a product is found to be unsuitable, it can be returned to us for a refund or exchange.


08 November 2016

These work for me. When I stopped taking them I slumped again.

We are so pleased to hear that you find our 5-HTP so beneficial.

08 November 2016

Used these in the past as a boost in the winter with consistent use they are quite effective although the recommended dosage does not conform to the pack size.

Thank you for your review.


06 November 2016


05 November 2016

Good: they helped me to sleep.

04 November 2016

This is a new Product I am trying to assist with Depression. It is too early to assess effectiveness.

Thank you for your feedback.

03 November 2016

I suffer from SAD, and also depression. Take just 100 msg daily and feel positive effects , so much so, I'm weaning off antidepressants. Although they do make my dreams more vivid , and heady headaches on waking in mornings less

Thank you for your positive review - Please be advised we are not Medical Practitioners at Healthspan, if you are taking prescribed medication, please check with a Medical Professional for compatibility.


28 October 2016

I took this last winter and think it helped to lift my mood slightly during the dark winter months. Haven't seen any change yet this time but only been on them for a couple of weeks