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- Manny people store cosmetic products and medications in the bathroom.
- John Horner, general director of 34 ST John, a luxury bathroom retail chain, said that extreme humidity and temperature changes in bathrooms reduce the lifespan of beauty products.
- "Constant moisture and temperature changes can decompose active ingredients and even promote bacterial growth," Horner said.
Bathroom Cabinets: A Bad Role for Your Beauty Products
Updated June 14, 2025
Manny people store cosmetic products and medications in the bathroom. However, experts say this may not be the best place.
John Horner, general director of 34 ST John, a luxury bathroom retail chain, said that extreme humidity and temperature changes in bathrooms reduce the lifespan of beauty products. He added that many don’t realize their bathroom is one of the worst places to keep cosmetics.
“Constant moisture and temperature changes can decompose active ingredients and even promote bacterial growth,” Horner said.
Sunscreen is especially vulnerable.Horner noted that storing sunscreen in bathroom cabinets could diminish its protective qualities. Heat and humidity cycles can destabilize sun protection molecules.
“If your sunscreen changes color or it smells different, it is time to replace it immediately, regardless of the expiration date,” he said.
Perfumes also suffer in the bathroom environment. “Perfume bottles can look very good on bath shelves, but fluctuating temperatures and moisture levels make fragrance compounds decompose much faster,” Horner explained.Thes conditions modify the chemical composition of perfumes, causing them to oxidize and smell different.
Horner suggests storing fragrances in a cool, dark place, such as a bedroom drawer, to extend their life. natural skin care products, often containing fewer synthetic preservatives, are also more susceptible to bacterial contamination in humid environments.
Products with ingredients like Vitamin C, retinol, and probiotics degrade rapidly when exposed to moisture and heat, according to Horner. Makeup, especially powders and articles without airtight seals, should also be kept out of the bathroom.
“Makeup brushes and sponges saved in the bathroom become a breeding ground for bacteria,which are then transferred directly to the skin,” Horner said. “This can cause outbreaks and infections.”
What’s next
Consider relocating your cosmetics and medications to cooler, drier locations to maximize their effectiveness and longevity. Regularly check products for changes in color, smell, or texture, which may indicate degradation.
