Is Sunscreen Left in the Car Still Usable?

Sunscreen is essential for protecting our skin from harmful UV rays

But what happens if you accidentally leave it in the car? Can it still provide effective protection, or should you replace it? Here’s the answer from Motorist!

How Heat Affects Sunscreen

Leaving sunscreen in a hot car, especially during summer, can cause changes in its composition. Most sunscreens are designed to remain stable at normal temperatures, but prolonged exposure to heat can:

• Break down active ingredients - Sunscreens contain chemicals like avobenzone, oxybenzone, or zinc oxide, which may lose effectiveness when exposed to high temperatures. This means they might not provide full protection against UV rays.
• Change texture - Heat can cause sunscreen to become watery, clumpy, or separated. If it looks different than usual, it may not spread evenly on your skin, reducing its effectiveness.
• Shorten shelf life - High temperatures can make sunscreen expire faster than expected, making it less reliable.

How Hot is Too Hot?

Most sunscreens should be stored at temperatures below 30°C (86°F). In a parked car, especially in summer, temperatures can rise well above this, sometimes exceeding 60°C (140°F). This extreme heat can quickly degrade the product.

How to Check If Sunscreen is Still Usable

If you’ve left your sunscreen in the car, check for these signs before using it:

• Separation - If the liquid and solid parts have separated and won’t mix when shaken, it’s best to discard it.
• Unusual Smell - A bad or off smell may indicate that the ingredients have broken down.
• Change in Color or Texture - If the sunscreen looks grainy, watery, or discolored, it might not work properly.
• Expiration Date - Even if it looks fine, check the expiration date. Heat can make it expire sooner than expected.

Sunscreen left in a hot car may not work as well as it should, which can put your skin at risk of sunburn and damage. If you notice any changes in texture, smell, or effectiveness, it’s safer to replace it. To ensure proper sun protection, store your sunscreen in a cool place and avoid prolonged exposure to high temperatures.

Read More:  Can Medicine Go Bad if Left in the Car?

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