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Tryptophan
Legal Status
by Erowid
U.S. FEDERAL LAW #
Caution :   All legal information should be verified through other sources. [see below]
U.S. FEDERAL LEGAL SUMMARY
5-HTP
REGULATED
No
STATUS
Supplement
SCHEDULE
Un-Scheduled
U.S. FEDERAL LEGAL SUMMARY
L-Tryptophan
REGULATED
Yes
STATUS
Supplement
SCHEDULE
Un-Scheduled
5-HTP (5-Hydroxy-Tryptophan) is sold over-the-counter across the United States and can be purchased in a variety of supplements. Its sale is weakly controlled by the US laws regarding 'nutritional supplements' (primarily the 1994 "Dietary Supplement Health & Education Act") and is included in a wide variety of nutritional "health" supplements.

L-Tryptophan now appears to be legal to sell as a supplement in the US. L-Tryptophan was controlled for sale in the United States (for human consumption only) by the FDA in 1989, due to association with a series of deadly and disabling symptoms. See Ceri.com's overview of this. Pure L-Tryptophan has been available in the United States as a veterinary supplement and in other forms not intended for general human consumption. Since 2001, more and more human-consumption-targeted products have shown up on the U.S. market and the defacto status of L-Tryptophan supplements appears to have changed.

There is some confusion added by a statement by the FDA from February, 2001 which states:
Although FDA continues to enunciate its concern about the safety of dietary supplements containing L-tryptophan and related compounds such as L-5-hydroxytryptophan, this does not mean that FDA prohibits the marketing of dietary supplements that contain L-tryptophan. Under the Food, Drug and Cosmetic Act (the Act), as amended by the Dietary Supplement Health and Education Act of 1994 (DSHEA), the manufacturer is responsible for ensuring that its products are safe. A firm is not required to obtain premarket review or approval from the FDA of its products before marketing them as dietary supplements. Moreover, a firm is not required to submit scientific evidence to FDA of the safety of its products or ingredients. While we are unaware of conclusive scientific data that would establish that a dietary supplement L-tryptophan would be safe, if a firm has information that it believes establishes that a product containing L-tryptophan is safe within the meaning of the Act, it could market such a product as a dietary supplement. The burden and responsibility for assuring that such a product is not adulterated under the Act is with the firm and not FDA.
This may mean that the FDA has softened its prohibition on the sale of L-Tryptophan containing supplements and these may now be considered 'legal' in the US. Importation of L-Tryptophan is still blocked under this rule.

INTERNATIONAL LAW #
Australia #
5-HTP & L-Tryptophan somewhat controlled. Reportedly can be ordered from overseas, but only rarely available over-the-counter. Reportedly available for purchase OTC in Queensland.
Austria #
Sold over-the-counter
Canada#
5-HTP and L-Tryptophan are reportedly legal and widely available from health food stores. (unconfirmed) (thanks BFBB)
Estonia #
5-HTP & L-Tryptophan are reportedly treated as medicines and are not available over the counter. (unconfirmed) (thanks s) (last updated Jan 31 2011)
France #
In France, tryptophan is controlled more as a pharmaceutical than as a food. Schedule 1: legal to possess with a prescription. Classified as an antidepressant. Sale tightly controlled. According to one contributor:
As of 2001, there is in france only 1 product, called LEVOTONINE containing OXYTRIPAN (5-HTP), and costs about 43 USD for 100 pills (treatment : 10 pills/day).
Italy #
5-HTP & L-Tryptophan are reportedly legal and widely available from health food stores, probably behind the counter?. Sold by pharmacists as 5-Idroxy-TP.
Germany #
5-HTP is available by prescription only in Germany. L-Tryptophan is available in pharmacies without a prescription. (unconfirmed)
New Zealand #
5-HTP & L-Tryptophan both legal and widely available from health food stores.
U.K. #
5-HTP & L-Tryptophan legal and widely available from health food stores.
If you have information about the legal status of this substance in any other country, please let us know.

CAUTION & DISCLAIMER #
Erowid legal information is a summary of data gathered from site visitors, government documents, websites, and other resources. We are not lawyers and can not guarantee the accuracy of the information provided here. We do our best to keep this information correct and up-to-date, but laws are complex and constantly changing. Laws may also vary from one jurisdiction to another (county, state, country, etc)...this list is not comprehensive.