5-HTP Capsules 100mg, 270 capsules
£34.99 for 270 capsules at Bulk. That works out at 13p per 100 mg, which ranks it 1st of the 9 5-HTP products we price across 6 UK retailers.
At one 100 mg dose a day, this pack lasts 9 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 270 ÷ 1 per serving = 270
- In the pack: 270 × 100 mg = 27 g
- £34.99 ÷ 27 g × 100 mg = 13p per 100 mg
- A week 13p × 7 = 91p · a month × 30 = £3.89 · a year × 365 = £47.30
- 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.
How it compares: 5-HTP
All 9, ranked →
Ranked purely by price per 100 mg. 10 combination products also contain 5-HTP.
Pack sizes
| Pack | Price | Per dose | A year |
|---|---|---|---|
| 270 capsulesthis pack | £34.99 | 13p | £47.30 |
| 90 capsules | £13.99 | 16p | £56.74 |
This pack is the cheapest of the 2 sizes per dose.
On the label
- 5-HTP · 5-HTP
- 100 mg per serving (stated on the label)
- Pack
- 270 capsules · 270 servings · 1 capsule(s) a serving
- Cost per serving
- 13p (270 servings in the pack)
More label details
- Barcode
- 5055950611344
- Sold by
- Bulk
- What the listing says
- “270 Capsules” · “Per Serving (1 Capsule)” · “[5-HTP ; 100mg]”
Ingredients
Bulking Agent (Microcrystalline Cellulose), Griffonia Seed (Griffonia simplicifolia) Extract (98% 5-HTP (5-Hydroxytryptophan), Capsule Shell (Hydroxypropyl Methyl Cellulose), Anti-Caking Agents (Magnesium Stearate, Silicon Dioxide).
From the Bulk listing. Check the pack itself if you have an allergy: labels mark allergens in bold.
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One 100 mg dose is our comparison unit, not a recommendation.
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Filled in from the label’s serving: 1 capsule.
What you paid
Optional. At Bulk today: £34.99.
“Order by” allows 3 working days’ delivery from Bulk and your spare days.
Price history
No price change since 20 September 2026. Checked on 1 day, most recently 20 September 2026.
- Price at every check
- £34.99Bulk
- First recorded
- £34.9920 Sept
- Checked on
- 1 daysince 20 Sept
Checked once so far, on 20 September 2026.
- First checked at Bulk: £34.99
Questions about this product
How much does Bulk 5-HTP Capsules 100mg cost per 100 mg?
13p per 100 mg, from £34.99 for 270 capsules at Bulk, checked on 20 September 2026.
Is it the cheapest 5-HTP in the UK?
Yes. Of the 9 we price across 6 UK retailers, this is the cheapest per 100 mg.
How long does one pack last?
9 months at one 100 mg dose. The pack holds 27 g in total.
About Bulk
Founded 2006 · Colchester, England
Bulk is a British sports nutrition company based in Colchester, Essex. Adam Rossiter and Elliot Dawes, who met at the University of Essex, started it in 2006 as Bulk Powders; it was renamed Bulk at the start of 2021, and the founders remain its majority owners.
All 133 Bulk products, priced per doseVisit Bulk (opens in a new tab)
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