Sunscreen contains chemical and/or physical active ingredients. Physical ingredients like zinc oxide or titanium oxide reflect or scatter ultraviolet (UV) radiation. Chemical ingredients like avobenzone or oxybenzone absorb UV radiation, dissipating it as heat.

Some sunscreens protect us from the two types of damaging UV radiation: UVA and UVB. These sunscreens are labeled as broad-spectrum sunscreens. The broad-spectrum test measures a product’s ultraviolet A (UVA) protection relative to its ultraviolet B (UVB) protection. Sunscreens that pass this test may be labeled as “Broad-Spectrum SPF (value)” on the front of their label. For broad-spectrum sunscreens, SPF values also indicate the amount or magnitude of overall protection. Broad- Spectrum SPF products with SPF valued higher than 15 provide greater protection and may claim additional uses. Only broad-spectrum sunscreens with an SPF value of 15 or higher can claim to reduce the risk of skin cancer and early skin aging if used as directed with other sun protection measures. Non-broad-spectrum sunscreens and broad-spectrum sunscreens with an SPF value between 2 and 14 can only claim to help prevent sunburn.  Source:

All EltaMD sunscreens are formulated with zinc oxide, a natural, mineral compound. Because zinc maintains its protective ability in the sun, it is more photostable than some chemical ingredients that may degrade. Zinc reflects and reduces the broadest range of UVA (aging) and UVB (burning) ultraviolet rays. EltaMD broad-spectrum sunscreens helps protect skin against burning, sun-induced early skin aging and and risk of skin cancer. Zinc is safe for even the most sensitive skin types.

Posted in: Sun Care