SPF has been around forever, but there are still so many myths that refuse to die. Let’s break down a few of the most common ones:

• Myth: SPF 50 is double the protection of SPF 25.
  Not quite. SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks about 98%. The difference is marginal—but that tiny margin matters if you’re outside all day.

• Myth: You don’t need sunscreen on cloudy days.
  Up to 80% of UV rays can pass through clouds. Translation: you can still burn on a gloomy beach day.

• Myth: Darker skin doesn’t need sunscreen.
  All skin tones can burn and are susceptible to long-term UV damage. Melanin provides some protection, but it’s not enough.

• Myth: Sunscreen lasts all day.
  Nope. Reapplication is the name of the game—every two hours, or after swimming and sweating.

Bottom line? Forget the myths and focus on the facts: SPF is non-negotiable, every day, for everybody.