New Delhi, Sept. 26 -- Vitamin D is often called the sunshine vitamin for a reason. It supports strong bones, a healthy immune system, and even mood regulation. That is why many people turn to supplements, assuming more is always better, but that is not true. In fact, you may not even need a vitamin D supplement if your body already gets enough from food and sunlight. Taking extra when it is not required can actually be harmful, leading to a condition called hypervitaminosis D. It causes symptoms like nausea, weakness, or frequent urination that may signal your body has more than it needs. Since toxicity almost always comes from supplements, not diet or sunlight, knowing the signs you do not need one is key to staying safe and balanced. ...