CA SB1033

Requires manufacturers of bulk and packaged protein products (powdered supplements, liquid beverages, concentrated protein foods) sold in California to test each lot for heavy metals (arsenic, cadmium, lead, mercury) at accredited laboratories, effective January 1, 2028

Mandates brand owners publicly disclose heavy metal testing results on their websites for the product's shelf life plus one month, including the name and level of each heavy metal found in each lot

Requires packaged protein products sold in retail stores to include labeling directing consumers to heavy metal testing information online, and products sold online must include a hyperlink to test results on the product details page

Prohibits the sale, manufacture, delivery, or offering for sale in California of any protein product that does not comply with these testing and disclosure requirements, with violations punishable as a misdemeanor

Testing laboratories must be ISO/IEC 17025:2017 accredited and demonstrate proficiency in detecting heavy metals at levels of 6 micrograms or less per kilogram of supplement