Think of sunscreen like a carton of milk. You wouldn’t pour expired milk on your cereal, right? The same logic applies to protecting your skin. The active ingredients that block UV rays break down over time.
Once they degrade, that SPF 50 you bought turns into… well, probably SPF 15 or even less. You’ll still feel like you’re protected, but your skin might end up looking like a very unhappy lobster.
The tell-tale signs
Your sunscreen will tell you it’s past its prime if you just pay attention. Look for a change in texture. If it’s become watery, clumpy, or separates into a greasy puddle, it’s time to say goodbye. Also, give it a sniff. If it smells like rancid oil or play-doh, trust your nose.
Most bottles have a little jar icon on the back with a number, like “12M”. That means it’s good for twelve months after opening. But honestly, if it’s been sitting in a hot car all summer, toss it earlier.
