Vitamin E is a fat-soluble vitamin that has a range of important functions in the body, including acting as an antioxidant. Antioxidants are molecules that help to protect cells from damage caused by free radicals. Free radicals are molecules that have been damaged by exposure to harmful substances, such as pollution or UV radiation. Vitamin E is found in a number of foods, including vegetable oils, nuts, and green leafy vegetables. It is also available as a supplement. There is some evidence that vitamin E may help to protect against certain types of cancer, including breast cancer and prostate cancer. Vitamin E may also help to reduce the risk of heart disease. Stem cells are cells that have the ability to develop into different types of cells. They are found in the bone marrow and can give rise to blood cells, such as red blood cells and white blood cells. Stem cells are also being studied for their potential to treat a range of diseases, including cancer, heart disease, and Alzheimer's disease. There is some evidence that vitamin E may help to protect stem cells from damage. This is because vitamin E has antioxidant properties. In one study, vitamin E was found to reduce the damage caused by free radicals to stem cells in the laboratory. The exact role of vitamin E in the body is still not fully understood. However, it is clear that vitamin E is important for health. Further research is needed to determine the exact ways in which vitamin E may protect against disease.