Maintaining good health depends on a steady supply of vitamins and minerals. These micronutrients play an essential role in body functions like energy production, nerve signaling, immunity, and bone strength. A lack or excess of them can lead to serious health issues, which is why regular monitoring through a full body checkup at a trusted healthcare facility is recommended. Vitamin A Vitamin A supports vision, skin health, and immunity. You can get it from foods like carrots, pumpkins, leafy greens, eggs, and dairy products. Too little vitamin A may cause night blindness and dry skin, while too much can lead to liver toxicity.