What vitamin deficiency causes bumpy skin on arms?
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4 min read
Keratosis pilaris (KP), the harmless skin condition often resulting in bumpy, rough skin, affects a significant portion of the population, with estimates suggesting up to 40% of adults and 50-80% of adolescents experience it. While genetics is the primary underlying factor for KP, a vitamin deficiency causes bumpy skin on arms and other affected areas by interfering with the normal processes of skin cell renewal.