Substance Wiki · All wiki entries

Testosterone

CAS 58-22-0

AI-assisted, human-edited — this page is drafted with AI from public-source data, then reviewed before publication. How we use AI →

Also known as: testosterone, androst-4-en-17β-ol-3-one

What it is + why it's regulated

Testosterone is a naturally occurring hormone found in both men and women, but it is also used in prescription medications for hormone therapy and in some over-the-counter supplements. It is listed on California's Proposition 65 because the state's Office of Environmental Health Hazard Assessment (OEHHA) has determined that it can cause cancer based on scientific evidence. This does not mean that normal levels of testosterone in the body are dangerous, but that high or prolonged exposure from external sources, such as certain medical treatments or unregulated products, may increase cancer risk. The listing is meant to inform consumers so they can make informed choices about products containing this substance. For more details, see the California OEHHA Proposition 65 List at https://oehha.ca.gov/proposition-65/proposition-65-list. This summary draws on public regulatory data; the linked source is authoritative.

Authoritative source

Issuing body: California Proposition 65
Primary register: https://oehha.ca.gov/proposition-65/proposition-65-list

Always verify each fact at the primary register before acting on it.

What this is NOT

ProductGuru is an INDEX of public regulatory data, not a primary source. This page is not medical, occupational-health, or legal advice. Every claim above is drawn from the issuing-agency register linked. Inclusion in our index is not endorsement, condemnation, or hazard assessment.

Related basics