Supplements must adhere to strict labeling laws, including accurate ingredient lists, allergen warnings, and expiration dates. Technical specs should focus on bioavailability (how well the body absorbs the nutrient) and the absence of heavy metals (Lead, Mercury, Arsenic). Ensure the manufacturer provides a Certificate of Analysis (COA) for every batch. For the US market, compliance with DSHEA (Dietary Supplement Health and Education Act) is mandatory, while the EU requires adherence to EFSA regulations.