Aug. 23, 2007 -- Sunscreens may get a new rating system and a warning, thanks to a new FDA proposal.
The FDA today proposed a new regulation that sets standards for formulating, testing, and labeling over-the-counter sunscreens with ultraviolet A (UVA) and ultraviolet B (UVB) protection.
The proposal includes a four-star rating system for sunscreen protection against UVA light, along with a warning that stresses the importance of not relying solely on sunscreens to prevent skin cancer and skin damage.
Sunlight contains the visible light that we can see and ultraviolet (UV) light that we cannot. There are two types of UV light, UVA and UVB. UVA light is responsible for tanning and UVB for sunburn. Both can damage the skin and increase the risk of skin cancer.
SPF ratings on sunscreens refer only to UVB protection, not UVA protection. For years, the FDA has been studying UVA's effects on skin, but until now hasn't required sunscreens to carry specific information on UVA protection.
"Only a few countries have addressed UVA protection in their product labeling," says Douglas Throckmorton, MD, deputy director of the FDA's Center for Drug Evaluation and Research.
The proposed new regulation would include cosmetics that tout sun protection but not insect repellents that include SPF, according to Matthew Holman, PhD, interdisciplinary scientist team leader at the FDA's Office of Nonprescription Products.
New UVA Sunscreen Ratings
The FDA's proposed sunscreen regulation is designed to be a consumer-friendly rating system for identifying the level of UVA protection offered by a product. It rates UVA sunscreen products on a scale of one to four stars.
One star would represent low UVA protection, two stars would represent medium protection, three stars would represent high protection, and four stars would represent the highest UVA protection available in an over-the-counter sunscreen product.
If a sunscreen product does not provide at least a low level (one star) of protection, the FDA is proposing to require that the product to bear a “no UVA protection” marking on the front label near the SPF value.
The UVA ratings would be based on two tests the FDA proposes to assess the effectiveness of sunscreens in providing protection against UVA light. One would be a lab test that measures a product's ability to reduce the amount of UVA radiation that passes through it. The other test would be conducted on people, checking the product's ability to prevent tanning. This test is nearly identical to the SPF test used to determine the effectiveness of UVB sunscreen products.