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Selling into California shouldn't feel like navigating a compliance minefield. As a brand owner, your goal is to get great products into customers' hands, not spend hours untangling complex regulations like Proposition 65. That's where having the right guidance matters. NourishUs Naturals helps businesses understand their obligations, avoid costly warning label mistakes, and move forward with confidence. When you get compliance right, you can expand into one of the world's largest consumer markets with fewer surprises and greater peace of mind. Ignore the requirements, however, and you could face product listing disruptions, enforcement actions, legal costs, and damage to your brand's reputation. Understanding the rules now can save significant headaches later.
California Compliance for Cosmetic Brands: Proposition 65 and State Ingredient Rules
If your brand sells into California, or even sells online where a California customer might buy it, two different sets of requirements can apply to the same product: Proposition 65's warning requirement, and California's own cosmetic ingredient laws. They often get confused because they both come out of Sacramento, but they serve different purposes, impose different obligations, and require different compliance strategies. It's worth understanding how each applies before a product listing goes live.
Proposition 65: a warning requirement, not an ingredient ban
Prop 65 doesn't prohibit or ban ingredients outright. It requires businesses to provide a warning label when a product exposes a California consumer to a listed chemical at a level the state considers a significant risk, either for cancer or reproductive harm. If your formula doesn't contain a listed chemical, or contains one below the established safe harbor level, a warning is generally not required.
Determining whether a warning applies comes down to a few paths: checking the formula against California's Office of Environmental Health Hazard Assessment (OEHHA) list of over 300 chemicals with established safe harbor levels, doing an independent exposure assessment, or, when the exposure picture is genuinely unclear, consulting a qualified toxicologist. Under Proposition 65, no product testing is legally mandated; businesses are expected to rely on available information about their formulation ingredients to determine if a warning is necessary.
Who Is Responsible for a Proposition 65 Warning?
One of the biggest questions brands have is, "Whose responsibility is the warning?" The answer isn't always straightforward. Under Proposition 65, primary responsibility sits with manufacturers, producers, packagers, importers, suppliers, and distributors, meaning the responsibility can start with us as your manufacturing partner. We can meet that obligation one of two ways: put the warning directly on the product label, or provide written notice and warning materials to you as the downstream seller, with your acknowledgment of receipt on file. Once that notice is provided, the responsibility shifts to the Retailers who are then responsible for properly displaying and maintaining the warning where a consumer will see it whether on packaging, in store, or online. If a retailer gets a violation notice without having known about the exposure beforehand, there's a narrow five-business-day window to fix it.
The good news is that this doesn't have to be complicated. When compliance is addressed early, everyone knows their role and products can move to market with confidence. The risk comes when warning requirements aren't discussed until after a product listing is live, which becomes far more disruptive and costly to fix.
This is why you need a trusted supplier-partner to guide you. The short version: if a warning is needed, that's a conversation between us before your product ships, not something to work out after a problem arises.
What Does a Proposition 65 Warning Need to Say?
If your product requires a Proposition 65 warning, it’s important to get the details right. California has specific requirements for warning language, and those requirements have recently changed.
The standard Prop 65 warning generally includes a warning symbol (a black exclamation point in a yellow triangle), a signal word such as "WARNING," "CA WARNING," or "CALIFORNIA WARNING," the name of at least one relevant listed chemical, a hazard statement describing the cancer or reproductive risk, and the route of exposure. As of a 2025 amendment, short-form warnings, the abbreviated version many labels use, must now name at least one specific chemical per risk category, where earlier versions could omit chemical names entirely. Businesses have until January 1, 2028 to fully transition to the new short-form language, and product already manufactured and labeled under the older format before January 1, 2028 can continue selling with no sell-through deadline. If you're selling online, note that internet retailers get 60 days after a manufacturer's notification to update warnings on a listing.
While the warning language itself is highly prescribed, the underlying goal is simple: give consumers clear information and give your brand a clear path to compliance. When warnings are handled correctly from the start, products move to market smoothly and with fewer compliance risks. When they're overlooked or implemented incorrectly, the fallout can be costly and hard to unwind.
Does Proposition 65 Apply to Your Business?
Prop 65 applies to any business with 10 or more employees operating in or selling into California, and penalties can run up to $2,500 per violation, per day, which is part of why private enforcement activity around Prop 65 stays high year over year.
California's Toxic-Free Cosmetics Act
Running alongside Prop 65 is California's own cosmetic ingredient law, the Toxic-Free Cosmetics Act, most recently expanded by Assembly Bill 496. Where Prop 65 is about warning consumers of exposure, the Toxic-Free Cosmetics Act works more like the ingredient restriction laws now showing up in other states: it bans specific ingredients known or suspected to cause cancer or reproductive harm outright, rather than simply requiring a warning, and AB 496 added a further list of restricted substances effective January 2027. A product can clear Prop 65 (no warning needed) and still need to meet the Toxic-Free Cosmetics Act's separate restriction requirements, so treat them as two checks, not one.
California is no longer the only state to watch
For years, California set the pace for cosmetic ingredient regulation, but today, brands selling nationally need to pay attention to a much broader and rapidly evolving compliance landscape. This part is worth calling out directly, because it's changing quickly: California was the first state to pass its own cosmetic rules, but it isn't the last. Washington's Toxic-Free Cosmetics Act is currently the strictest in the country, restricting formaldehyde, lead, mercury, PFAS, and several other substances as of January 2025, with more restrictions phasing in through 2027. Colorado passed its own PFAS-in-cosmetics ban in 2022, effective January 2025. Maryland, Illinois, Vermont, and Oregon have each passed their own restrictions on similar substances, however only Maryland's restriction (HB 643) took effect in Jan 2025. Oregon's SB 546 takes effect Jan 1, 2027. Vermont's Act 131 phases in Jan 1, 2026, and July 1, 2027. Illinois's cosmetic ingredient ban (HB 3409) wasn't signed until July 2026 and takes effect July 1, 2028, so it isn't in force yet. Minnesota has its own version already in place, and New York has similar legislation pending.
And if you're thinking, "I just wanted to sell skincare, not earn a law degree," you're in good company. Most brand owners didn't start their business to become experts in fifty different regulatory frameworks. That's why we're here, to help you stay ahead of the changes without losing focus on growing your brand. We keep an eye on the regulatory landscape so you can keep your focus on growing your brand with confidence.
The takeaway is simple: If your brand sells nationally, California compliance is the floor, not the whole picture. Think of California as the starting point, not the finish line. Brands that monitor emerging state regulations proactively will be far better positioned to avoid reformulation challenges, product disruptions, and costly compliance surprises down the road.
What this means for your listings
Compliance doesn't need to slow down a launch if it's handled early; it simply becomes another step in getting your products to market confidently and protecting the brand you’ve worked hard to build. As your manufacturing partner, we are here to help guide the process. We track which of our formulas contains a chemical that could trigger a Prop 65 warning, and we can provide the compliant language when needed. While we are not your legal counsel and cannot provide legal advice, we can help identify potential compliance considerations before production begins. What we'd ask from you is to flag your intended sales markets before a run goes into production, since a formula destined for Washington or Colorado may need a different look than one that's California-only, and getting that alignment early is a lot simpler than relabeling after the fact.
*This overview reflects Proposition 65 and state cosmetic law as of August 2026. These rules change on an ongoing basis at both the state and California administrative level, so confirm current requirements with us or with counsel before a formula or label ships.
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