Yes, sunscreen does expire, and using expired sunscreen can significantly reduce its effectiveness, leaving your skin vulnerable to sun damage.

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Why Sunscreen Expires

Sunscreens are regulated by the U.S. Food and Drug Administration (FDA) as over-the-counter drugs. The FDA requires that sunscreens maintain their original strength for at least three years. If a sunscreen doesn’t have an expiration date, it’s advisable to discard it three years after purchase .

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How to Identify Expired Sunscreen

If your sunscreen lacks an expiration date, consider the following signs to determine if it’s still effective:

• Changes in texture: If the sunscreen appears watery, dry, or gritty.
• Altered color: A significant change in color can indicate degradation.
• Off smell: A sour or unusual odor suggests the product may have gone bad .

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Proper Storage to Extend Shelf Life

To maintain the efficacy of your sunscreen:

• Store in a cool, dark place: Avoid leaving it in hot environments or direct sunlight.
• Avoid freezing: Extreme cold can also degrade the product.
• Keep tightly sealed: Ensure the cap is closed to prevent contamination .

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Risks of Using Expired Sunscreen

Using expired sunscreen can lead to:

• Sunburn: Due to reduced protection against UV rays.
• Skin reactions: Such as rashes or allergic responses.
• Increased risk of skin cancer: Due to inadequate protection over time .

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Best Practices

• Check expiration dates: Always look for an expiration date on the packaging.
• Replace annually: Even if not expired, consider replacing sunscreen each year to ensure maximum protection.
• Use adequate amounts: Apply about one ounce (30 milliliters) to cover your body and reapply every two hours, or more frequently if swimming or sweating.

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