What SPF tells you
SPF primarily describes protection against UVB-related sunburn under standardized testing. Broad-spectrum labeling indicates protection against both UVA and UVB. No sunscreen blocks all ultraviolet radiation, and labels differ across markets.
Application changes performance
People often apply less sunscreen than testing assumes. Follow the product directions, cover exposed skin evenly and reapply as directed, especially after swimming, sweating or towelling. Clothing, shade and avoiding intense sun are useful additional measures.
Choose one you will use
Texture, finish, price and skin sensitivity influence whether a product becomes a habit. If you have a skin condition or a history of reactions, a pharmacist or dermatologist may help you identify a suitable option.
A thoughtful next step
Use this guide as a starting point, not a rigid rulebook. Consider your own circumstances, look for reliable sources, and seek qualified professional advice when a decision affects your health or safety.