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Definition of Retinol
Medically reviewed by Min Clinic Staff | Updated: January 2026
Retinol: An animal form of Vitamin A. Retinol is converted from retinyl palmitate which is found in beef, chicken liver, eggs, fish liver oils, and dairy products including whole milk, whole mild yogurt and cottage cheese, butter, and cheese. (The plant based Vitamin A source is beta-carotene.) Vitamin A is essential to vision, especially night vision, bone and tooth development, reproduction, skin and mucous membranes.