Hopefully, you've heard these before' but let's reapply.
Depending on your body size, experts recommend using enough lotion to fill a shot glass, or 30g, when you're at the beach. Even if people are smart enough, said Dr Jerry Brewer, a dermatological surgeon at the Mayo Clinic in Minnesota. Even if the bottle says the location is after swimming. If you're not swimming, you should reapply every two hours, regardless of the SPF count. You should put sunscreen on 15 minutes before exposure. Look for products that are labelled "broad-spectrum protection",with an SPF of 15 to 50