Retinoic Acid Topically Always consult your primary physician when starting a nutrition program with Retinoic Acid Topically. Retinoic acid (used simplified here for all-trans-retinoic acid) is a metabolite of vitamin A1 (all-trans–retinol) that mediates the functions of vitamin A1 required for growth and development. All-trans-retinoic acid is required in chordate animals, which includes all higher animals from fish to humans. During early embryonic development,… Continue reading Nutrient Profile – Retinoic Acid Topically