Oxybenzone-d3 (Benzophenone 3-d3) is a deuterium-labeled form of Oxybenzone. Commonly used as a UV filter in tanning and skin protection products, Oxybenzone (Benzophenone 3) acts as an endocrine-disrupting chemical (EDC) that can cross both the placental and blood-brain barriers. It impairs autophagy, alters epigenetic states, and disrupts retinoid X receptor signaling in apoptotic neuronal cells.