Which nutrient's deficiency can lead to hair loss?

A deficiency in protein can lead to hair loss because hair is primarily composed of a protein called keratin. Adequate protein intake is crucial for the growth and repair of tissues, including the hair follicles. When the body does not receive enough protein, it can enter a state of stress, leading to hair shedding and thinning. This is because the body prioritizes the use of protein for essential functions over non-essential ones, such as hair growth.

While vitamins and other nutrients play roles in overall hair health, protein deficiency directly impacts the structural integrity and growth cycles of hair. Therefore, ensuring sufficient protein intake is vital not only for maintaining healthy hair but also for overall bodily functions and recovery.