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Higher NatureAmino acids & derivatives

Serotone 5HTP 100mg, 90 capsules

£26.37 for 90 capsules at Vitamin Planet. That works out at 29p per 100 mg, which ranks it 6th of the 9 5-HTP products we price across 6 UK retailers.

What it really costs, per 100 mg29pOne 100 mg dose is our comparison unit for 5-HTP. It is not a recommendation.

A day29p

A week£2.05

A month£8.79

A year£106.95

At one 100 mg dose a day, this pack lasts 3 months. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Servings: 90 ÷ 1 per serving = 90
In the pack: 90 × 100 mg = 9 g
£26.37 ÷ 9 g × 100 mg = 29.3p per 100 mg
A week 29.3p × 7 = £2.05 · a month × 30 = £8.79 · a year × 365 = £106.95
Amount per serving: stated on the label.

The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.

Cheaper 5-HTP

All 9, ranked →

5-HTP Capsules 100mgCheapest per 100 mgBulk · 100 mg a serving · £3.89 a month · a pack lasts 9 months13p£34.99View at Bulk

5-HTP Capsules 100mgBulk · 100 mg a serving · £4.66 a month · a pack lasts 3 months16p£13.99View at Bulk

ZipVit5-HTP Griffonia Seed Extract 750mgZipVit · 61.3 mg a serving · £4.90 a month · a pack lasts 4 months16p£17.99View at ZipVit

ZipVit5-HTP Griffonia Seed Extract 750mgZipVit · 61.3 mg a serving · £6.53 a month · a pack lasts 55 days22p£11.99View at ZipVit

Griffonia Seed Extract 5-HTP SupplementLamberts Healthcare (Nature's Best) · 100 mg a serving · £7.75 a month · a pack lasts 2 months26p£15.50View at Lamberts Healthcare

Higher NatureThis productVitamin Planet · 100 mg a serving · £8.79 a month · a pack lasts 3 months29pshown above

Switching to the Bulk pack saves £4.90 a month at the same 100 mg dose.

Ranked purely by price per 100 mg. 10 combination products also contain 5-HTP.

On the label

5-HTP · 5-HTP: 100 mg per serving (stated on the label)
Pack: 90 capsules · 90 servings · 1 capsule(s) a serving
Cost per serving: 29p (90 servings in the pack)

More label details

Sold by: Vitamin Planet
What the listing says: “90 Capsules” · “1 capsule daily” · “5HTP 100mg”

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Daily dosemgFordays

One 100 mg dose is our comparison unit, not a recommendation.

Price history

No price change since 7 October 2026. Checked on 1 day, most recently 7 October 2026.

Price at every check: £26.37Vitamin Planet
First recorded: £26.377 Oct
Checked on: 1 daysince 7 Oct

Checked once so far, on 7 October 2026.

7 OctFirst checked at Vitamin Planet: £26.37

Questions about this product

How much does Higher Nature Serotone 5HTP 100mg cost per 100 mg?

29p per 100 mg, from £26.37 for 90 capsules at Vitamin Planet, checked on 7 October 2026.

Is it the cheapest 5-HTP in the UK?

No, it is 6th of 9. 5-HTP Capsules 100mg at Bulk works out at 13p per 100 mg.

How long does one pack last?

3 months at one 100 mg dose. The pack holds 9 g in total.

About Higher Nature

All 81 Higher Nature products, priced per dose

Keep comparing

All 5-HTPEvery form, cheapest per 100 mg first 5-HTP guideWhat it is, why people take it, how the forms differ Higher NatureAll 81 products from this brand, per dose Amino acids & derivativesEverything else we price in this category 5-HTP price historyEvery 5-HTP product's price per dose and price history Build a basketThe cheapest way to buy several at once How we compareWhere every number on this page comes from