Skin, nail, and hair problems
Protein deficiency often leads to spots on the skin, nails, and hair, which largely compose of protein. Kwashiorkor for instance in children characterizes by splitting, flaking of skin along with redness or depigmented patches on the skin. Faded hair color, hair thinning, brittle nails, and hair loss (Alopecia) are also most commonly occurring symptoms of protein deficiency. Moreover, these problems are more likely to develop in people who suffer from a severe protein deficiency.