title: Hypovitaminosis A, follicular ducts, and acne.
mesh_terms: D000152:Acne Vulgaris / Q000209:etiology* / Q000378:metabolism; D006197:Hair / Q000378:metabolism*; D006801:Humans; D012629:Sebum / Q000378:metabolism; D014801:Vitamin A / Q000378:metabolism; D014802:Vitamin A Deficiency / Q000150:complications* / Q000378:metabolism
chemical_list: D014801:Vitamin A