Recalls and alerts more than 4 years old are automatically archived. While this information can still be accessed in the database, it has not been altered or updated since it was archived. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards. As per the Communications Policy of the Government of Canada, you can request alternate formats by contacting us.

Archive – Health Canada Warns Consumers Not to Use Supplements Containing Methyl-1-testosterone due to Potential Serious Health Risks

Starting date:
February 6, 2006
Posting date:
February 6, 2006
Type of communication:
Natural health products
Source of recall:
Health Canada
Important Safety Information, Unauthorized products
General Public
Identification number:

Health Canada is warning consumers not to use the product M1T (methyl-1-testosterone) Andro Technologies, or any other supplements containing the synthetic steroid methyl-1-testosterone, due to such potentially serious health risks as liver disorders and hardening of the arteries.

M1T (methyl-1-testosterone) Andro Technologies, promoted for use as a legal steroid and body building supplement, has not been authorized for sale in Canada. To date, Health Canada has received one serious adverse reaction report of liver toxicity involving M1T (methyl-1-testosterone) Andro Technologies as a suspected agent.

Methyl-1-testosterone, a derivative of the steroid testosterone, is a controlled substance in Canada. There are currently no authorized methyl-1-testosterone products on the Canadian market. When used improperly, methyl-1-testosterone can cause serious adverse reactions, including reduced fertility, hardening of the arteries, liver damage and enlargement or tenderness of male breasts or nipples.

Canadians using M1T (methyl-1-testosterone) Andro Technologies or any other supplements containing this steroid are advised to stop taking these products immediately and consult with a health care professional if they have health concerns.

Health Canada has notified the Canada Border Services Agency to detain any shipment of M1T (methyl-1-testosterone) Andro Technologies or any other products containing methyl-1-testosterone at the border.

Canadians are advised to contact the Health Products and Food Branch Inspectorate at 1-800-267-9675 if they find M1T (methyl-1-testosterone) Andro Technologies or any other products containing methyl-1-testosterone on the Canadian market.

Consumers and health care professionals are encouraged to report any adverse reaction suspected as being associated with methyl-1-testosterone use by contacting the Canadian Adverse Drug Reaction Monitoring Program (CADRMP) of Health Canada by one of the following methods:


Marketed Health Products Directorate
Health Protection Building, Tunney's Pasture, AL 0701C


Media enquiries

Health Canada

Public enquiries