How Prop 65 Applies to Food, Supplements, and Consumer Products (2026)

Introduction: One Law, Multiple Industries

If your business sells food, dietary supplements, cosmetics, or consumer products, you may be subject to California Proposition 65.

However, Proposition 65 does not apply uniformly across all product categories. Each category presents different exposure pathways, risk profiles, and compliance expectations. Understanding how the law applies to your specific product type is essential to avoiding violations and building a defensible compliance system.

What Does Prop 65 Regulate?

Proposition 65 requires businesses to:

Identify listed chemicals in products
Evaluate consumer exposure
Provide warnings where required
Maintain documentation supporting compliance decisions

The law is administered by the California Office of Environmental Health Hazard Assessment (OEHHA), which maintains a list of over 900 regulated chemicals.

How Prop 65 Applies to Food Products

Key Risk: Naturally Occurring Chemicals

Food products often contain naturally occurring contaminants such as lead, cadmium, and arsenic. These may originate from soil conditions, agricultural practices, or processing methods.

Compliance Focus:

Ingredient sourcing and supplier control
Laboratory testing for heavy metals
Exposure assessment based on consumption levels
Evaluation of naturally occurring exemptions (where applicable)

Natural presence does not automatically exempt a product from Prop 65 requirements.

How Prop 65 Applies to Dietary Supplements

Key Risk: Concentrated Ingredients

Dietary supplements present elevated risk because they concentrate plant-based materials, are consumed regularly, and may accumulate heavy metals over time.

Compliance Focus:

Ingredient-level risk analysis
Batch testing and verification
Daily intake exposure calculations
Labeling and warning determination

Supplement products typically require more rigorous testing and documentation than standard food products.

How Prop 65 Applies to Cosmetics and Personal Care Products

Key Risk: Dermal Exposure

Cosmetic products introduce chemicals through skin contact rather than ingestion. Exposure assumptions differ significantly from food and supplements.

Compliance Focus:

Dermal exposure assessment
Ingredient safety evaluation
Testing for contaminants
Labeling and warning placement

How Prop 65 Applies to Consumer Products

Key Risk: Material Composition and Use

Consumer products may expose users through skin contact, inhalation, or incidental ingestion depending on product design and use.

Common Examples:

Packaging materials
Plastics and polymers
Electronics and accessories

Compliance Focus:

Material composition analysis
Use-case exposure scenarios
Migration or release testing
Labeling requirements

Key Differences Across Product Categories

Food: ingestion-based exposure and natural contaminants
Supplements: high concentration and repeated intake
Cosmetics: dermal absorption
Consumer Products: mixed exposure pathways

Each category requires a tailored compliance approach.

Why One Approach Does Not Fit All

Using food exposure assumptions for cosmetics
Skipping exposure assessments for supplements
Applying warnings without testing or evaluation

Proposition 65 compliance must be product-specific and supported by data.

Core Compliance Requirements Across All Categories

Chemical identification
Laboratory testing
Exposure assessment
Warning determination
Documentation
Ongoing monitoring

While the framework is consistent, application varies by product type.

Why Businesses Get It Wrong

Assuming all products require warnings
Ignoring differences in exposure pathways
Relying solely on supplier documentation
Failing to test finished products
Not maintaining compliance records

Prop 65 enforcement focuses on whether your compliance decisions are defensible.

Final Thoughts: Category-Specific Compliance Is Critical

Proposition 65 applies broadly—but not uniformly.

Food differs from supplements. Supplements differ from cosmetics. Consumer products require unique evaluation.

Effective compliance requires:

Understanding your product type
Identifying exposure pathways
Evaluating risk levels
Maintaining structured documentation

Get Expert Support for Your Product Category

If you are unsure how Proposition 65 applies to your product, a structured compliance approach is essential. Building a system that includes testing, documentation, and ongoing monitoring helps ensure your business remains compliant and defensible.

There is no one-size-fits-all solution—only a compliance system tailored to your product and risk profile.