We all know tanning can cause skin ageing and skin cancer. Although it is important to avoid excessive UV radiation, sunlight also has a positive effect on the body’s resilience, and synthesis of vitamin D. Sunlight boosts our mood by raising endorphin levels. Balance your time in the sun and use protection.UV radiation from the Sun is classified into three primary types: UVA, UVB, and UVC, based on their wavelengths. The ozone layer protects us from almost all of the UVC radiation. UVB is mostly absorbed by the ozone layer – although a small percentage does reach the Earth’s surface. Long-wave UVA radiation is not absorbed by the ozone layer. UVA radiation intensity does not depend on the season or time of day. It also is not blocked by window glass. UVB rays are most intense at midday and closer to the equator where the path through the ozone layer is the shortest. That is why maintaining the ozone layer is so important.