How to Choose the Right Sunscreen? A Comprehensive Guide with Lukewarm Sunscreen!
Understanding SPF and Broad-Spectrum Protection What is SPF? Sun Protection Factor, or SPF, measures how well a sunscreen blocks UVB rays, which are the primary reason behind sunburns. Dermatologists advise using an SPF of at least 30, which blocks 97% of UVB radiation, for daily usage. While certain SPFs offer somewhat more protection than others, no sunscreen is 100% effective at blocking UVB rays. Importance of Broad-Spectrum Protection : UV rays come in two forms: UVA and UVB. UVA rays penetrate deeper into the skin than UVB rays, which causes sunburn. They also increase the risk of skin cancer and premature ageing. Broad-spectrum sunscreens offer complete coverage by blocking UVA and UVB rays. Activity Level : Water-resistant sunscreen is a must whether you're swimming or participating in outdoor activities. When perspiring or swimming, formulae that are water-resistant retain their SPF for a certain amount of time (often 40 or 80 minutes). It's crucial to reapply as instr...