Sunlight provides us with Vitamin D, which helps regulate and maintain our body's phosphate and calcium levels. Lack of these can cause rickets in children and osteomalacia in adults. But, as we all know, with the benefits come the drawbacks. UVA and UVB rays from the sun are also damaging to the skin. Ultraviolet A (UVA) rays have a longer wavelength and are known to cause skin damage and be one of the primary causes of skin ageing. Ultraviolet B (UVB) rays have a shorter wavelength and are a key cause of sun tanning, sunburn, skin thickening, and many types of skin cancer.