Detailed answer

Hyperpigmentation, or darkening of the skin, can be linked to vitamin deficiency. Certain vitamins, such as vitamin B12 and vitamin D, play a role in maintaining skin health. Deficiency in these vitamins can affect melanin production, which can result in uneven skin pigmentation. Inadequate levels of vitamin C can also hinder the production of collagen, a protein responsible for maintaining skin elasticity and preventing pigmentation issues.