Does Sunscreen Expire—and How to Tell

Yes, sunscreen does expire. The U.S. Food and Drug Administration (FDA) requires all sunscreens sold in the United States to have an expiration date unless stability testing proves they remain effective for at least three years. Most products are labeled with a clear “EXP” date or a period-after-opening symbol—often depicted as an open jar with a number followed by “M,” such as “12M,” indicating the product remains stable for 12 months after first opening.

If no expiration date appears on the packaging, assume it expires three years from the manufacturing date—but only if stored properly: away from direct sunlight, excessive heat, and humidity. High temperatures accelerate degradation of active ingredients like avobenzone, oxybenzone, or zinc oxide, reducing UV protection even before the stated expiry.

Signs your sunscreen may no longer be effective include noticeable changes in texture—such as separation, graininess, or unusual thickening—or alterations in color or scent. Oil-based formulas may develop a rancid odor; mineral sunscreens might clump or become difficult to spread evenly. If any of these occur, discard immediately—even if within the printed timeframe.

Always check the bottle before use. Store sunscreen in cool, dry places—not in cars, beach bags exposed to sun, or near windows. When in doubt, replace it. Effective sun protection depends not just on correct application but also on using chemically intact, fully potent product. Your skin’s safety relies on both timing and integrity.