Brittle hair and nails typically indicate a deficiency in which vitamin?

Brittle hair and nails are often indicative of a deficiency in Vitamin A. This vitamin plays a crucial role in maintaining healthy skin, hair, and nails by supporting the production of sebum, an oily substance that helps keep hair and nails moisturized. When there is a deficiency, the lack of sebum can lead to dryness and brittleness, making hair and nails more prone to breakage.

Vitamin A is also important for the proper functioning of the body's cells, including those in the hair follicle and nail bed, which further emphasizes its role in promoting strong and healthy hair and nails. Inadequate levels of this vitamin can disrupt these processes, leading to the weak and brittle characteristics observed.

While other vitamins have their roles in overall health, they are not typically associated with the specific symptoms of brittle hair and nails to the same extent as Vitamin A.