- #Customer reviews for cyme skin care reviews skin#
- #Customer reviews for cyme skin care reviews simulator#
Our sunscreen ratings, updated now for the second time in 2021, currently have fewer products than in past years, primarily because of the pandemic’s impact on our testing schedule, and because some previously tested sunscreens have been reformulated or discontinued. That’s why, for our ratings, we also use a test that allows us to measure the degree of UVA protection a sunscreen provides. This is a pass/fail test, and just as you can pass a test with either an A or a D grade, some sunscreens do a much better job of defending against UVA than others. This test is similar to the critical wavelength test the FDA requires sunscreen manufacturers to do in order to label their products broad-spectrum. That information is used to calculate our UVA score. To test for UVA protection, we smear sunscreen on plastic plates, pass UV light through, and measure the amount of UVA and UVB rays that are absorbed.
#Customer reviews for cyme skin care reviews skin#
UVA rays penetrate deeply into the skin and cause damage that can lead to skin cancer and skin aging. In order to be labeled “broad spectrum,” the FDA requires that a sunscreen protect against UVB and UVA rays. This is a measure of how closely a sunscreen’s tested SPF matched the SPF on the label. We also calculate a score for variation from SPF. The resulting SPF ratings-Excellent to Poor-reflect each product’s effectiveness after water immersion and are based on an average of our results for each sunscreen. About a day later, a trained technician examines the areas for redness.
#Customer reviews for cyme skin care reviews simulator#
Afterward, smaller sections of that area are exposed to five to six intensities of UV light from a sun simulator for a set time. To check SPF, a standard amount of each sunscreen is applied to 2x3-inch rectangle on panelists’ backs. SPF stands for “sun protection factor” and is a measure of how well a sunscreen protects against sunburn, which is mostly the result of exposure to the sun’s UVB rays. “We use three samples, preferably with different lot numbers, of each product.” All the products are tested for SPF and ultraviolet A (UVA) protection. “We buy the sunscreens for our tests off the shelf, the way consumers would,” says Susan Booth, the project leader for our sunscreen testing.