5-HTP 100mg (Previously named Happy Days)

100mg 5-HTP with zinc and B vitamins

"Very good product, and good delivery"

1-2 month supply Only 13p per day
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What is 5-HTP 100mg?

  • 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)

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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

Recommended Intake

Initially one tablet daily, increasing to a maximum of three daily if required. Use for three months, stop and review

Tablet / Capsule Information

  • Width 20.2mm
  • Height 8.8mm
  • Shape Oval

Note: Colour of the tablet shown here may differ slightly. This has no effect on the quality of the product and is part of the natural manufacturing process. Tablet not shown at actual size.

Typical values per Tablet   % NRV
Griffonia Seed Extract
providing 5-HTP 100mg
Vitamin B3 30mg NE 188
Vitamin B6 2.8mg 200
Vitamin C 80mg 100
Biotin 50µg 100
Folic Acid 100µg 50
Zinc 5mg 50
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NRV:Nutrient Reference Value RE: Retinol Equivalent a-TE: Alpha Tocopherol Equivalent NE: Niacin Equivalent µg: Micrograms

Recommended Intake

Initially one tablet daily, increasing to a maximum of three daily if required. Use for three months, stop and review


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.

Additional Information

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.

Independent Reviews for Happy Days® 5-HTP Tablets

Overall Rating: 4.51 / 5 stars, based on 485 reviews Below you can find the latest 25 reviews. To access the full list please click here

12 January 2017

for some reason this time it did not arrive yet after more than 21 days and you are sending it agian

Thank you for your comments. May we offer our apolgoies for the delay in receieving your order. We hope you recieve the replacement items within the next few days.

11 January 2017

I am on my second pack of the tablets but whether there is much improvement is difficult to judge as I have been unwell with a very bad cough which has had an effect on my mood due to feeling unwell and not sleeping.

07 January 2017

Very good product, and good delivery

Thank you for your review, We aim to provide the highest quality vitamins delivered quickly to your door, and are glad we have on this occasion.

30 December 2016


29 December 2016

Im taking 1 aday and they seem to have helped me feel more positive.

We are pleased to hear that you are experiencing some positive benefits from this product.


28 December 2016

Works by lifting depression naturally

It is lovely to hear that the product is helping.

27 December 2016

Very helpful - calming and effective against mood-swings.

Thank you for your review.

25 December 2016


23 December 2016

Really works well for me .

We love to hear that the product is working well for you.

20 December 2016

Very good, and seen you can also take 5htp daytime.

19 December 2016


13 December 2016

Great pick me up. I also use 5HTP to relax on the odd occasion and switch off at night time rather than having any alcohol.

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 💥

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.