The best SPF for someone at age 25 is SPF 30 or higher.
This is because SPF 30 blocks approximately 97% of the sun's harmful UVB rays, which are responsible for sunburn and skin cancer. SPF 50 blocks about 98% of UVB rays, offering slightly more protection.
While a higher SPF seems like it would be better, the difference in protection between SPF 30 and SPF 50 is minimal. It's more important to apply sunscreen generously and reapply it every two hours, especially after swimming or sweating.
Remember that all sunscreens should be broad-spectrum, meaning they protect against both UVA and UVB rays. Look for sunscreens with ingredients like oxybenzone, octinoxate, avobenzone, or zinc oxide.
It's important to note that there is no "one size fits all" answer for SPF. The best SPF for you depends on your skin type, lifestyle, and personal preferences. If you have sensitive skin, you may want to look for a sunscreen that is fragrance-free and hypoallergenic. If you spend a lot of time outdoors, you may want to choose a sunscreen with a higher SPF.
Regardless of your age, it's essential to protect your skin from the sun's harmful rays. By using sunscreen regularly, you can help prevent sunburn, premature aging, and skin cancer.
