Proposition 65
Last updated: October 2, 2026
California's Proposition 65 requires businesses to warn California consumers about exposure to certain chemicals. You may see these warnings on some of the products we carry. Here's what they mean.
What Is Proposition 65?
Proposition 65, officially the Safe Drinking Water and Toxic Enforcement Act of 1986, is a California law. It requires the state to keep a list of chemicals known to cause cancer, birth defects, or other reproductive harm. The list includes hundreds of chemicals.
Businesses must give a clear and reasonable warning before exposing someone in California to a listed chemical above certain levels.
Why Supplements Carry Warnings
Most supplement warnings come from heavy metals like lead, cadmium, and arsenic. These metals occur naturally in soil and water, and plants absorb them as they grow.
That's why warnings often appear on products made from plants, minerals, or cocoa, like greens powders, plant proteins, and chocolate flavors. Many everyday foods, like spinach and other leafy greens, naturally contain trace amounts of the same metals.
What a Warning Does and Doesn't Mean
Prop 65 is based on how much of a chemical you could be exposed to each day. For chemicals linked to reproductive harm, the limit is set 1,000 times lower than the level where no effect was observed. For lead, that limit is 0.5 micrograms a day.
A warning means the business believes a product may expose you to a listed chemical above that limit, or has chosen to warn rather than test every batch. A warning is not a finding by the state that a product is unsafe, and Prop 65 does not ban any product.
If you're pregnant, nursing, or planning to have children, talk to your doctor before using any supplement.
How Get Yok'd Handles Warnings
Get Yok'd is a retailer. The brands we carry make, test, and label their products, and they determine which products need a warning.
When a brand provides a Prop 65 warning, it appears on the product label. Always check the label before use.
Questions about a specific product? Email cs@getyokd.com or call toll free at (844) 996-9653, and we'll help you get answers from the brand.
What a Warning Looks Like
Here is an example of a standard warning for supplements and food:
WARNING: Consuming this product can expose you to chemicals including lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/food.
Learn More
P65Warnings.ca.gov, California's consumer site for Prop 65 warnings.
OEHHA, the state agency that runs Prop 65.