What cannot be labeled on sunscreen products?

The label "Cancer inhibitor" cannot be used on sunscreen products because it implies a definitive health benefit that cannot be substantiated. Sunscreens are designed to protect the skin from the harmful effects of ultraviolet (UV) radiation, which can contribute to skin cancer, but claiming that a product can inhibit cancer is misleading and not supported by scientific evidence.

On the other hand, terms such as "water-resistant," "UV blocker," and "broad-spectrum" have specific definitions and regulatory standards that govern their use on labels. "Water-resistant" indicates that the sunscreen will maintain its SPF protection for a specific amount of time while the user is sweating or in water. "UV blocker" suggests that the product provides a barrier against ultraviolet rays, though it’s often referred to with more precise terms like "broad-spectrum" to include protection against both UVA and UVB rays. Therefore, while these terms can be used to inform consumers about the product's effectiveness, the term "Cancer inhibitor" cannot be legally or ethically applied to sunscreen labeling.