Vitamin D deficiency is very common in India despite the country’s sunlight, and it can show up as fatigue, bone pain, muscle weakness, low immunity, and mood changes. The good news is that it can often be improved with a mix of sunlight, diet changes, and doctor-guided supplements. Why It Happens Many people in India spend most of the day indoors, which reduces direct sun exposure needed for vitamin D production. Air pollution, sunscreen use, and full-body clothing can also block UVB rays and make deficiency more likely. Diet can be another factor, especially for people who eat little fatty fish, eggs, or fortified foods. In some cases, medical conditions that affect absorption can also contribute to low levels. Also Read: Best whey protein in India Common Symptoms Low vitamin D can cause a range of symptoms, and they often develop slowly. Common signs include: Fatigue or constant tiredness. Bone pain or general aches. Muscle weakness. Frequent illness or low immunity. Mood chan...