L-Tryptophan

En vente sur le marché américain (selon le DSLD)

Douglas Laboratories, food supplement from the US market

Displayed label: Official label. Labels on the market are prioritised, followed by the most recent for the same status.

If this product were sold in France

• Dose déclarée au-delà d'une limite

  Vitamine B6: up to 20.1 mg a day according to the label (at most 3 servings a day), above the maximum dose of 2 mg set in France for a food supplement (2006 Order, not revised since November 2006).

  Source: French orders of 9 May 2006 and 14 November 2006 as published in the Official Journal (maximum daily doses), arrêté du 9 mai 2006, annexe III.

• À vérifier

  Vitamine B6: up to 20.1 mg a day according to the label, above the limite de sécurité from EFSAEuropean Food Safety Authority. for adults (12 mg a day). Le repère de l'EFSA porte sur l'apport total d'une journée, alimentation et compléments.

  Source: EFSA, Overview on Tolerable Upper Intake Levels (version 11, August 2025), limite supérieure de sécurité (UL).

A daily dose is calculated only if the label gives the maximum number of servings and a unit of mass (or international units for vitamin D). Quantities come from the label, not an analysis. In the United States, the label presents this product as a ‘dietary supplement’; in France, a product of this type may belong to another category (a sports powder, for example), and maximum food supplement doses do not apply to it.

Label composition

Other versions of this label

The differences below describe each other version relative to the label shown on this page. They concern active ingredient rows and quantities per serving as written. Missing quantities are not estimated and different units are not converted. Dates refer to entry into DSLD, not necessarily to a formula change.

• Official label: L-Tryptophan
  Entered into DSLD on 23 August 2020. Retirée du marché américain le 31 January 2024 (selon le DSLD).

  • Active ingredient added : BioPerine (5 mg)
  • Active ingredient added : Niacin (26.7 mg)
  • Active ingredient added : Riboflavin (10 mg)
  • Active ingredient added : Vitamin C (10 mg)
  • Different quantity per serving : Vitamin B6: 10 mg in this version; 6.7 mg on the displayed label
  • Different unit, without conversion : L-Tryptophan: 1,000 mg in this version; 1,000 mcg on the displayed label

• Official label: L-Tryptophan
  Entered into DSLD on 24 February 2017. Retirée du marché américain le 18 May 2020 (selon le DSLD).

  • Active ingredient added : Bioperine (5 mg)
  • Active ingredient added : Niacin (10 mg)
  • Active ingredient added : Riboflavin (10 mg)
  • Active ingredient added : Vitamin C (10 mg)
  • Different quantity per serving : Vitamin B6: 10 mg in this version; 6.7 mg on the displayed label
  • Different unit, without conversion : L-Tryptophan: 1,000 mg in this version; 1,000 mcg on the displayed label

• Official label: L-Tryptophan
  Entered into DSLD on 25 July 2013. Retirée du marché américain le 16 December 2016 (selon le DSLD).

  • Active ingredient added : Bioperine (5 mg)
  • Active ingredient added : Niacin (10 mg)
  • Active ingredient added : Riboflavin (10 mg)
  • Active ingredient added : Vitamin C (10 mg)
  • Different quantity per serving : Vitamin B6: 10 mg in this version; 6.7 mg on the displayed label
  • Different unit, without conversion : L-Tryptophan: 1,000 mg in this version; 1,000 mcg on the displayed label

• Official label: L-Tryptophan
  Entered into DSLD on 25 July 2012. Retirée du marché américain le 20 January 2012 (selon le DSLD).

  • Active ingredient added : Bioperine (5 mg)
  • Active ingredient added : Niacin (10 mg)
  • Active ingredient added : Riboflavin (10 mg)
  • Active ingredient added : Vitamin C (10 mg)
  • Different quantity per serving : Vitamin B6: 10 mg in this version; 6.7 mg on the displayed label
  • Different unit, without conversion : L-Tryptophan: 1,000 mg in this version; 1,000 mcg on the displayed label

• Official label: L-Tryptophan
  Entered into DSLD on 23 February 2012. Retirée du marché américain le 20 January 2012 (selon le DSLD).

  • Active ingredient added : Bioperine (5 mg)
  • Active ingredient added : Niacin (10 mg)
  • Active ingredient added : Riboflavin (10 mg)
  • Active ingredient added : Vitamin C (10 mg)
  • Different quantity per serving : Vitamin B6: 10 mg in this version; 6.7 mg on the displayed label
  • Different unit, without conversion : L-Tryptophan: 1,000 mg in this version; 1,000 mcg on the displayed label

Source

Official label

List declared on 22 April 2021 (register: Dietary Supplement Label Database (DSLD), US National Institutes of Health: current and off-market labels).

List recorded in 2021. Photograph the packaging to check whether it has changed. Photograph the packaging

Brand : Douglas Laboratories