🗃Compiled automatically from public product data — the attributes on this page are assembled from the sources we hold, not written by a person or drafted by AI, and individual pages are not reviewed one by one. How we use AI →
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.
GHS hazard classifications and PubChem CIDs from NIH PubChem (NCBI / U.S. National Library of Medicine, public domain). Hover any pictogram for its meaning.
🔍 What we found about this product
A factual report of what public registries and product databases returned for this EAN. We do not authenticate products or issue safety verdicts — we only report what we found.
Identifier checks
📋 EAN format: the GTIN-13 mod-10 checksum is consistent with the GS1 standard (format check only; does not authenticate the physical product)
📋 GS1 prefix 063 indicates the issuing office in United States / Canada (this is the country where the brand owner registered the EAN; it is not necessarily where the product was manufactured. Source: GS1 country code list)
📋 Brand entries found: no entry for Muscletech in the Wikidata brand registry (our coverage of Wikidata is partial; absence is not a finding either way)
📋 Listed in 2 of the public product catalogues we check: Open Food Facts, Nudger GTIN dataset (CC-BY 4.0) (catalogue presence only; the listing itself does not authenticate the product)
Registry scans
📋 Recall registry scan returned 0 matches (sources scanned: CPSC, FDA, RAPEX, Health Canada, NHTSA. Coverage gaps exist; we cannot speak to records outside these registries)
📋 Substance database scan returned 30 name matches with H-codes / regulated-substance entries (see substances section. This is a name match against label/ingredient text only; it does not confirm batch presence)
📋 Banned-ingredient scan (EU Cosmetic Annex II) returned 0 matches (source: EU Reg. 1223/2009. Scanned against available label text only)
📋 Certifications listed in our databases: none found (registries scanned: EU Ecolabel, US ENERGY STAR, US EPA Safer Choice. Many legitimate products are not enrolled in these schemes)
📋 Medical device registry: not listed in US FDA GUDID or EU EUDAMED (most consumer products are not medical devices and would not be expected to appear)
Sources scanned: GS1 country prefix · Wikidata brand registry · Open Beauty / Food Facts · USDA FDC Branded Foods · Nudger GTIN dataset · EU Safety Gate (RAPEX) · US CPSC · US FDA recalls · Health Canada Recalls · NHTSA recalls · ECHA SVHC · REACH Annex XVII · EU RoHS · Stockholm POPs · CLP Annex VI · EU Cosmetic Annex II · EU Ecolabel · US ENERGY STAR · US EPA Safer Choice · US FDA GUDID · EU EUDAMED. Last refreshed: .
About this section. We aggregated what we found across 24 public registries and product databases as of . This is not an authentication, certification, or safety endorsement. Coverage gaps in our source data exist. For definitive verification, please contact the manufacturer or the relevant regulator directly.
Disclaimer. Substance and ingredient information is matched against public government registries (cited above) and may be incomplete or imprecise for a specific batch. This page is informational only and does not constitute medical, legal, or safety advice. For health concerns consult a qualified specialist. For confirmed product safety status refer to the manufacturer and the linked regulatory source.
Provenance
Last updated: . See About for the full source list.