5-HTP Capsules 100mg, 90 capsules
£13.99 for 90 capsules at Bulk. That works out at 16p per 100 mg, which ranks it 2nd of the 9 5-HTP products we price across 6 UK retailers.
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
- £13.99 ÷ 9 g × 100 mg = 15.5p per 100 mg
- A week 15.5p × 7 = £1.09 · a month × 30 = £4.66 · a year × 365 = £56.74
- 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 →
Switching to the Bulk pack saves 78p a month at the same 100 mg dose.
Ranked purely by price per 100 mg. 10 combination products also contain 5-HTP.
Pack sizes
| Pack | Price | Per dose | A year |
|---|---|---|---|
| 270 capsules | £34.99 | 13p | £47.30 |
| 90 capsulesthis pack | £13.99 | 16p | £56.74 |
At one 100 mg dose a day, the 270 capsules pack costs £9.44 less a year than this one.
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
- 16p (90 servings in the pack)
More label details
- Barcode
- 5055950610835
- Sold by
- Bulk
- What the listing says
- “90 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.
Add to your basket
View basketYour basket prices everything you take together: whole packs, delivery included, from as few websites as you like.
One 100 mg dose is our comparison unit, not a recommendation.
Add to my stack
My stackSee when it runs out, the day to reorder by and what it costs you a day. Free, kept on this device.
Filled in from the label’s serving: 1 capsule.
What you paid
Optional. At Bulk today: £13.99.
“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
- £13.99Bulk
- First recorded
- £13.9920 Sept
- Checked on
- 1 daysince 20 Sept
Checked once so far, on 20 September 2026.
- First checked at Bulk: £13.99
Questions about this product
How much does Bulk 5-HTP Capsules 100mg cost per 100 mg?
16p per 100 mg, from £13.99 for 90 capsules at Bulk, checked on 20 September 2026.
Is it the cheapest 5-HTP in the UK?
No, it is 2nd 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 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)
More from Bulk
- 5-HTP Capsules 100mg5-HTP · 270 capsules13p per 100 mgCheapest per dose in its tableDetails and price history
- Bacopa Monnieri 350mgbacopa extract · 90 capsules10p per 300 mgCheapest per dose in its tableDetails and price history
- Beta Alaninebeta-alanine · 1 kg6p per 3.2 gCheapest per dose in its tableDetails and price history
- Caffeine 200mgcaffeine · 250 tablets5p per 200 mgCheapest per dose in its tableDetails and price history
