What are UVA and UVB rays and what is the difference between them?
UVA stands for Ultra Violet Aging rays and UVB stands for Ultra Violet Burning rays. Sun rays are source for both UVA and UVB rays. Excessive exposure to both forms of UV rays can lead to the development of skin cancer. UVA rays have less energy than UVB rays and penetrate deeper into the base layer of skin, causing damage to dermis.. UVA rays causes suppression of the immune system, thereby interferes with the immune system’s ability to protect against the development of skin cancer. Exposure to UVA rays lead to wrinkling and age spots, which are signs of premature aging of the skin. UVB rays are more powerful rays that affect the outer surface of the skin. UVB rays are majorly responsible for sunburns, we get when our skin is unprotected. What does SPF mean? SPF stands for “Sun Protection Factor”. Most sunscreens specify SPF numbers on the packaging which range from as low as 2 to as high as 80. a SPF number measures the length of time, a product can screen or block out sun’s burning
