Carrots (Daucus carota) are a tuber and an ideal food for health. It's crunchy, delicious and very nutritious. It is also a good source of many vitamins and minerals, especially biotin, potassium and B6. Concentrate the carrots on the carotenoids. Diets that contain carotenoids may help protect against many types of cancer, and high blood cholesterol is a known risk factor for heart disease. People who have low levels of vitamin A are more likely to suffer from night blindness.