Most makeup has expiration dates for a reason — once preservatives break down, bacteria can grow, formulas lose potency, and products stop working as intended.
But here’s what most people don’t know: heat accelerates that process.
🧴 What changes:
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Preservatives break down faster in high temperatures.
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Oils and actives degrade, causing formulas to spoil before the printed date.
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SPF and vitamin C lose effectiveness in days if exposed to heat.
How to fix it:
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Store makeup below 77°F.
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Use insulated storage on hot days or when traveling.
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Discard products that change color, smell, or texture.
Think of makeup like skincare — how you store it matters as much as how you apply it.