SPF stands for sun protection factor more accurately than UVB radiation. If the number factor is higher – UVB protection is higher. UVB rays vary throughout the day. They are strongest at noon. UVB radiation stimulates the production of melanin, responsible for tanning. They stimulate cells to form a thicker epidermis. UVB rays cause burns and damage to the skin especially during the summer months. They do not penetrate as deeply, but they create free radicals at all levels of the epidermis.
UVA stands for ultraviolet A rays that penetrate deeper into our skin. Products that contain the UVA + symbol must provide a minimum level of protection from UVA rays. The ratio should be 1: 3 for UVA: UVB protection. Likewise, if the cream says it provides broad-spectrum protection, it means it offers both UVA and UVB protection.
UVA and UVB radiation have different waves of light. UVB waves cause burns and premature skin aging. UVA waves penetrate deeper into the skin where they also sample damage. Both UVA and UVB rays damage collagen and cause fine lines, wrinkles and hyperpigmentation. UVA rays make up about 95% of the UV light that reaches people and are considered the biggest threat to the skin. They are present during the day whether it is sunny or not – and can penetrate the glass. UVB rays have a much smaller range, but are responsible for those visible changes on the skin surface such as burns.
There are many conflicting tips on the effectiveness of various sunscreens that we should apply with each application. It is generally accepted that most people do not apply enough cream. We should apply two small spoons of sunscreen on the face, hands and neck or two small spoons of cream on the whole body. It is enough to lightly cover the skin with the cream as the last step in the skincare routine about 30 minutes before going out in the open. Dermatologists advise you to apply the cream every day during the summer, just before leaving home. Then every few hours during the stay in the outdoor area. It is desirable to choose cosmetic products with SPF protection or, even better, protection of a wide range. There are many moisturizers, powders, lip balms and hair sprays that are formulated with sun protection.