Sunscreen expiration: when to toss the bottle
An expired sunscreen is worse than no sunscreen, because it convinces you you're protected when you're not. Read the date, store smart, and replace bottles every season.
Want a personalized reapply schedule based on your location and skin? Use the smart sunscreen timer →
Three years from manufacture
The FDA requires sunscreens to maintain their stated SPF for three years from the date of manufacture. If a bottle doesn't have a printed expiration date, write the purchase date on it with a marker and toss it three years later — or sooner if it lived in a hot car or beach bag.
Heat is the enemy
Sunscreen stored above 25°C (77°F) degrades much faster. Cars in summer, beach bags in direct sun, and shower windowsills are all bad storage spots. Cool, dark, and dry — bathroom cabinet, hallway closet, fridge if you live somewhere very hot. If your bottle has been in a car all summer, replace it.
Signs of a bad bottle
Separation (oily liquid pooling on top, thick paste on the bottom — even after shaking). Color change (yellowing, greyish tint). Smell change (rancid, sour, or chemical). Watery consistency where it used to be creamy. Any of these means the formula has broken down and the SPF rating no longer applies. Toss it.
Buy small, replace often
A travel-size tube you actually finish in one summer is more reliable than a year-old family bottle. The smart sunscreen timer can't save you from expired product — but matching your bottle size to your use rate can.
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