Health knowledge: sunbathing every day is good, it is good for our health, then how to sunbathe? Taking time out every day, fifteen minutes of sun exposure is enough. This method can help us prevent cancer. This method does not cost money and is very simple. It can help us prevent cancer by increasing the content of vitamin D in the human body. Its deficiency will increase the risk of some cancers, such as breast cancer. In order to prevent exposure to the sun and increase the risk of skin cancer, we only need to be exposed for 15 minutes a day.