rBST (Recombinant Bovine Somatotropin)
Also known as: rBGH, Bovine Growth Hormone, Posilac
Growth hormone (dairy)
US-EU Regulatory Divergence
This additive has different regulatory status in the US and EU — what's permitted in one region may be restricted or banned in the other.
Regulatory Status
United States (FDA)
ApprovedFDA-approved for use in dairy cows to increase milk production.
European Union (EFSA)
BannedBanned in EU, Canada, Japan, Australia, and New Zealand due to animal welfare and potential health concerns.
Safety Profile
US stands alone among major economies in permitting rBST. FDA says milk from treated cows is safe. EU ban is primarily precautionary and animal welfare-based.
Health Concerns
- • Increases IGF-1 levels in milk (linked to cancer risk in some studies)
- • Animal welfare concerns (higher rates of mastitis in treated cows)
- • No direct evidence of harm to humans from consumption
Commonly Found In
Sources: FDA Substances Added to Food, EFSA opinions, EU Regulation 1333/2008, IARC monographs
SafeCheck provides drug interaction information from FDA-approved product labeling (openFDA). This is for informational purposes only and is not medical advice. Always consult your healthcare provider before making medication decisions.