SPF stands for Sun Protection Factor. It is a universal metric that measures the level of sun protection each sunscreen formula can provide. La Roche-Posay offers sunscreen products with a broad spectrum SPF of 30 through 100.

When it comes to choosing the right SPF, La Roche-Posay recommends using a broad spectrum SPF of 30 or higher for effective sun protection. This helps to protect the skin from both UVA and UVB rays, which can cause skin damage and increase the risk of skin cancer.

It is recommended to apply sunscreen as part of your morning routine, approximately 15 minutes before going out in the sun. Reapply sunscreen every 2 hours. Make sure to use water resistant sunscreen if swimming or sweating. It's also important to use sunscreen every day, as UV rays can still affect the skin even on cloudy days or during winter.

You should reapply sunscreen every two hours for consistent protection, as recommended by La Roche-Posay and other skincare experts. This frequency applies even if you are indoors, as UV rays can penetrate glass and cause skin damage.

Mineral sunscreens contain natural minerals like zinc oxide and titanium dioxide to create a physical barrier, reflecting UV light. Chemical sunscreens use ingredients such as oxybenzone and avobenzone to absorb and dissipate UV rays.