# L-Tryptophan – B000GFSVS2

> Price comparison in United Kingdom (GBP). Lowest price right now: **£22.65** at iHerb GBP, in stock. 2 offers from 2 shops, prices from £22.65 to £62.49. Checked 2026-10-21T13:32:50Z.

## Product
- Brand: BritishVita | Premium UK Vitamins & Wellness Supplements
- Category: [Health & pharmacy](https://pricuro.com/uk/health-pharmacy.md) > [Vitamins & supplements](https://pricuro.com/uk/health-pharmacy/vitamins-supplements.md)
- EAN/GTIN: 0021078019855
- Manufacturer part number: B000GFSVS2
- Page: https://pricuro.com/uk/p/l-tryptophan-b000gfsvs2-406832
- Image: https://pricuro.com/img/406832/800/l-tryptophan-b000gfsvs2.webp

## Offers (2, sorted by total price incl. delivery; used/refurbished last)

| # | Shop | Price | Delivery | Total | Availability | Condition | Buy |
|---|---|---|---|---|---|---|---|
| 1 | iHerb GBP | £22.65 | see shop | – | in stock | new | https://pricuro.com/go/147063655 |
| 2 | OnBuy.com | £62.49 | free | £62.49 | in stock | new | https://pricuro.com/go/7811177 |

## Vouchers and offers from these shops

- iHerb GBP: Metagenics: 20% Off – code `OCT26MTG` (valid until 2026-10-28)
- iHerb GBP: 20% Off Supplements Experts Take Daily – code `OCT26DAILY` (valid until 2026-11-09)
- iHerb GBP: 15% off new customers – code `EU15N` (valid until 2026-12-31)
- iHerb GBP: 20% off Doctor's Best Supplements – code `DRBEST26` (valid until 2027-01-01)
- iHerb GBP: 15% off for NEW Customers – code `15NEWC` (valid until 2027-01-01)
- iHerb GBP: 10% off $60 – code `GOLD60` (valid until 2027-01-01)
- iHerb GBP: 20% off for NEW Customers – code `NEW20` (valid until 2027-01-01)
- iHerb GBP: 15% off Paradise Herbs – code `PARADISE15` (valid until 2028-01-01)
- iHerb GBP: Get 10% off over 50 GBP with the code GOLDGB. – code `GOLDGB` (valid until 2028-09-08)
- iHerb GBP: 15% off First In-App Purchase – code `MYAPP15` (valid until 2031-01-01)

## Price history (lowest price per day in United Kingdom, tracked since 2026-10-03, 19 days)

- Lowest price today: £22.65
- Last 30 days: lowest £22.65, highest £62.49, average £53.37
- All-time low on Pricuro: £22.65 (2026-10-21)

| Date | Lowest price |
|---|---|
| 2026-10-03 | £40.14 |
| 2026-10-04 | £40.14 |
| 2026-10-05 | £40.14 |
| 2026-10-06 | £40.14 |
| 2026-10-07 | £58.49 |
| 2026-10-08 | £58.49 |
| 2026-10-09 | £58.49 |
| 2026-10-10 | £58.49 |
| 2026-10-11 | £58.49 |
| 2026-10-12 | £58.49 |
| 2026-10-13 | £58.49 |
| 2026-10-14 | £58.49 |
| 2026-10-15 | £58.49 |
| 2026-10-16 | £58.49 |
| 2026-10-17 | £58.49 |
| 2026-10-18 | £62.49 |
| 2026-10-19 | £62.49 |
| 2026-10-20 | £62.49 |
| 2026-10-21 | £22.65 |

## Specifications


Description (from a shop): Source Naturals L-Tryptophan 500mg supports mood, relaxation, and sleep. This essential amino acid is the precursor to two natural compounds of great importance.\n\nThe essential amino acid L-tryptophan is the precursor of two natural compounds of great importance.\nSuggested Use: 1 capsule three times daily, between meals and preferably with fruit juice. To support restful sleep, take an additional 3 capsules before bed.\nWell Made Supplement. Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial color, flavor or fragrance.\nTRUSTED FOR OVER 35 YEARS. Source Naturals was created in 1982 by CEO Ira Goldberg to support each individual's potential to enj…

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