Hair loss can often be linked to deficiencies in essential vitamins that support healthy hair growth. Lack of nutrients like vitamin D, vitamin B12, and biotin may weaken hair follicles and lead to increased shedding. Iron deficiency is another common factor that can affect hair strength and growth cycle. Poor nutrition or imbalanced diets can further contribute to thinning and slow r... https://www.layersclinics.com/which-vitamin-deficiency-causes-hair-loss/