Vitamin A (vit. A) is essential for normal differentiation and maintenance of epithelial tissues in skin and mucous membranes, vision (retinaldhyde), reproduction (retinol), and embryonic morphogenesis.
Retinoids (compounds with biological activities similar to those of vit. A) are used as therapeutic agents for hyperkeratotic and parakeratotic skin diseases, acne and acne-related disorders, and hand eczema. They are also used as prophylaxis for epithelial skin tumors in immune-suppressed patients and as therapy for nonmelanoma skin cancers and cutaneous T-cell lymphoma.
Regular monitoring is essential for the avoidance and management of a wide range of adverse effects.
KeywordsNicotine PGE2 Hypothyroidism Myopathy Ceramides
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