Dermatologists Are Begging People to Stop Believing This One Sunscreen Myth
No, your 'base tan' is not protecting you — and the truth about SPF numbers will change how you shop.
Every summer it comes back like a bad sunburn: the claim that getting a 'base tan' protects your skin from damage. Skin doctors have a blunt response — a tan is damage. It's your skin cells waving a tiny white flag.
A base tan offers roughly the protection of a laughably low SPF — nowhere near enough to matter. Meanwhile, the myth convinces people to skip real sunscreen early in the season, which is exactly when many of the worst burns happen.
Here's the number that surprises everyone: SPF 30 blocks about 97 percent of UVB rays, and SPF 100 only nudges that a little higher. The bigger factor isn't the number on the bottle — it's whether you apply enough and reapply every two hours.
The rule of thumb going viral: a full shot glass of sunscreen for your body, a nickel-sized dollop for your face, and reapply after swimming no matter what the label promises. Your future self will thank you.
