The same goes for products stored in direct sunlight. “Any product that was stored in extremes of temperature (beach bag/hot car/freezing holiday home during winter) should be discarded. Skincare labeled as ‘preservative free’ will be particularly sensitive to degradation and microbial contamination under excessively hot conditions. Temperature extremes, including the freezer, heat of the direct sun, or storage in a hot car will all impact product shelf life and stability. Bailey says: “Skincare products are designed to withstand the range of normal room temperature. While this makes practical sense for when you’re showering and washing, the rapid rise and fall of temperature and humidity in the bathroom can have a negative impact on the stability of your products, and their efficacy as a result.ĭr.
When we surveyed American skincare users, we found that a huge 84% keep their products in the bathroom.
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