: Predominant in human skin (approx. 87%), making it a primary target for retinoid-based skin treatments [12, 26].
: Present in most tissues; involved in immune regulation and T-cell differentiation [4, 26]. 82.rar
: In research, "RAR" often stands for Retinoic Acid Receptors . A "deep review" in this context refers to the extensive study of how these nuclear receptors regulate gene expression, cell growth, and immune responses [1, 11]. Specific RAR subtypes (alpha, beta, gamma) are critical for processes like sleep quality and skin health [2, 12]. : Predominant in human skin (approx