Prop 65 is a law passed by California to protect its residents from toxic substances that may cause cancer or birth defects. It was formerly known as the Safe Drinking Water and Toxic Enforcement Act of 1986. The goal of Prop 65 is to reduce or eliminate exposure to toxic substances. Under this law, no food or supplement product may be sold into California unless it is below specific arsenic, cadmium, lead, and mercury exposure levels and poses no significant risk. For the food and supplement industry, Prop 65 compliance requires testing that certifies whether or not a product can be sold in California.
Arsenic, cadmium, lead, and mercury are some of the substances officially listed by California to cause cancer, birth defects or other reproductive harm. The state of California enforces this law in two ways: by requiring businesses to provide a clear and reasonable warning informing the consumer of the exposure risk or by prohibiting the substances above the designated legal limit.