Vitamin D is a fat-soluble vitamin primarily synthesized through skin exposure to sunlight, though it can also be obtained through diet. Vitamin D is responsible for promoting the absorption of substances like calcium and magnesium in the intestines.



The main symptoms of vitamin D deficiency include fatigue, weakness, low mood, weakened immune function, hair loss, and more. Long-term vitamin D deficiency can impact calcium absorption and lead to symptoms such as muscle cramps. In severe cases, it can cause osteoporosis and rickets. Foods rich in vitamin D include fatty fish, animal liver, nuts, egg yolks, and meats.

People at high risk of vitamin D deficiency include those with insufficient sun exposure, the elderly, infants and young children, pregnant women, people with darker skin and office workers.