Consumers can finally compare different products without getting lost in unknown numbers and acronyms. SPF is the best known indicator of the effectiveness of a sunscreen. It expresses the level of protection against UVB rays (always ultraviolet radiation, such as UVA, but at different wavelengths). UVB are responsible for erythema, burns and burns. The scale and Massage Byron Bay Area is only one internationally, which simplifies life for everyone.
To avoid numbers that had a more commercial or health purpose, a maximum protection limit was set at 50. There are four standardized categories: low protection (from 6 to 10), medium (15-25), high (30-50 ), very high (50+). In reality below 8, you should not even talk about protection. In this the United States is clearer with the consumer, since creams with SPF of less than 15 cannot have the words protect from UV rays.
