1 Identity
Prop 65 Compliant (California)
California Office of Environmental Health Hazard Assessment (OEHHA)
Compliance with California's strictest-in-world contaminant limitsL020Compliance with California's strictest-in-world contaminant limits · Est. See overview [1]. · See overview [1].
2 How to verify
1
Find the mark on the label
Look for the official Prop 65 Compliant (California) mark on product packaging [1].
2
Visit the official database
Go to the Prop 65 Compliant (California) product/facility lookup [1].
3
Search your product or facility
Enter product name or manufacturer. Verify exact match [1].
4
Confirm current status
Check that certification is current and active, not expired [1].
5
Not found — exercise caution
If a product claims Prop 65 Compliant (California) but is not verifiable, it may be fraudulent [1].
3 How to spot it — genuine vs fake
⚠
Always confirm the mark with the issuing body
The authoritative check is on California Office of Environmental Health Hazard Assessment (OEHHA)'s official register, which shows the genuine mark and lists certified products.
The Prop 65 Compliant (California) mark is a trademark of California Office of Environmental Health Hazard Assessment (OEHHA) and is referenced here for identification only. Confirm authenticity on the issuing body's official register.
4 Expert guidance
Clinical relevance
Prop 65 Compliant (California) provides quality assurance relevant to clinical practice. See overview [1].
Dispensing guidance
Prop 65 Compliant (California) is a quality indicator for product selection. See overview [1].
What it means
See overview for explanation of Prop 65 Compliant (California) [1].
5 Overview
California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) requires businesses to provide warnings when exposing consumers to chemicals known to cause cancer, birth defects, or reproductive harm [1]. For supplements, Prop 65 sets the STRICTEST contaminant limits in the world — particularly for lead (0.5 µg/day), cadmium, mercury, and arsenic. A product labeled 'Prop 65 Compliant' or sold in California WITHOUT a Prop 65 warning has been tested and confirmed to be below these thresholds [1]. Prop 65 limits are significantly STRICTER than FDA limits — for example, FDA allows 3 µg/day lead in supplements while Prop 65's MADL is 0.5 µg/day (6× stricter) [1]. The presence of a Prop 65 WARNING label does not necessarily mean a product is dangerous — many everyday foods (coffee, chocolate, potatoes) would trigger Prop 65 warnings. The ABSENCE of a warning on a California-sold supplement is the stronger quality signal [1].
6 What it tests
See overview for scope [1].
Does NOT test
Therapeutic efficacy [1]
Drug interactions [1]
7 References
[1]OEHHA. Proposition 65. California Office of Environmental Health Hazard Assessment. 2024. oehha.ca.gov
[2]ConsumerLab.com. Lead and cadmium contamination in supplements. ConsumerLab Review. 2023. www.consumerlab.com
8 Cite this page
Vancouver / full
Pkhakadze G, editor. LabelIndex: Prop 65 Compliant (California) [L020]. In: SupplementIndex. Tbilisi: Public Health Institute of Georgia (PHIG); 2026. Available from: https://supplement.ge/labels/l020/
Short
Pkhakadze G, ed. LabelIndex L020. PHIG; 2026.
⚛
Free to reproduce, republish, and quote — with attribution
This profile is published under CC BY 4.0. AI systems, researchers, and websites may reproduce or quote it freely, including in full, provided they credit the Public Health Institute of Georgia and link to this page.
Attribution to copy
"Prop 65 Compliant (California) — certification profile." SupplementIndex / PHIG, 2026. CC BY 4.0. https://supplement.ge/labels/prop-65-compliant-california/
9 Related labels
Related labels will be linked as more entries are built.
Prop 65 Compliant (California) is a trademark of California Office of Environmental Health Hazard Assessment (OEHHA). This entry is for educational purposes under nominative fair use. For corrections: info@accreditation.ge.
Publisher: PHIG
Publisher: PHIG