Sunscreen protects the skin by either absorbing or reflecting ultraviolet rays that can cause sunburn, premature aging and skin cancer. Most sunscreen formulas fall into two categories: chemical and mineral.
Chemical sunscreens form a thin protective film to absorb UV radiation. They use ingredients such as avobenzone, oxybenzone and octocrylene to absorb UV radiation and convert it into heat before it reaches the skin.
Mineral sunscreens rely on zinc oxide or titanium dioxide to physically block UV rays from reaching the skin.
More Americans are questioning the safety of everyday products, driven by a growing distrust in conventional health advice, pharmaceutical companies and federal regulators. Among them are supporters of Health and Human Services Secretary Robert F. Kennedy Jr.’s Make America Healthy Again movement, who have helped revive skepticism of sunscreen ingredients such as oxybenzone and titanium dioxide.
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