![]() To prolong the life of any blush, clean your blush brush regularly and store the color in a dark, dry place to avoid promoting bacterial growth. Cream blush, however, should be replaced after a year, "since the formula environment is generally one where bacteria can thrive and application of this product form is usually done with the fingertips," says Teschendorf. The same rules that apply to face powder apply to powder blush. Still, as Wilson has told Allure, "some powders contain small amounts of water from botanical extracts, so there's the risk of it growing bacteria if you leave it lying around your bathroom." Look on the ingredients panel for long Latin names - these are often botanicals, and their common names (such as oat extract, chamomile, aloe, bamboo, and green tea extracts) are typically listed in parentheses. Powders, both pressed and loose, are the Energizer Bunny of makeup. The closer to liquid form a concealer is, the sooner it should be tossed concealers in powder and stick form can last for up to two years, while liquids should be replaced after one. "You'll know it's gone bad because the color will start to shift," cosmetic chemist Ni'Kita Wilson has told Allure. This is meant to cover blemishes, not cause them - which is what can happen if you use a concealer that's too old. "Separation can make the preservative system less effective and therefore make the product prone to contamination." Concealer "Separation can be seen as an oil layer forming on top, color not distributed correctly throughout the product, or a water layer forming on the bottom," says Koestline. Another sign of a liquid or creamy foundation (or concealer or blush) being past its prime: separation. Switch mascara every three months to be safe, and absolutely do not use the same one for longer than six months.Īn off smell or a change in color tells you the formula is finished - applying it could cause irritation or breakouts. Teschendorf concurs, telling Allure, "This product form has one of the shortest PAOs due to its high potential to get directly into the eyes and cause serious infection." Lingering bacteria can cause redness and itchiness, or even conjunctivitis (pinkeye) and sties. ![]() Mascara is the makeup item you should be most vigilant about: As the brush is taken out, applied, and put back in the tube, it brings with it any bacteria that has collected along the way, explains cosmetic chemist Jim Hammer. Pati Dubroff is a celebrated makeup artist who has worked with numerous designers and celebrities like Kristen Stewart, Margot Robbie, and Kirsten Dunst.Athena Teschendorf is the development and regulatory affairs manager for SOS Beauty, a brand incubator that helps develop brands and their formulas.Jim Hammer is a cosmetic chemist and the founder of Mix Solutions, which works with brands on solving formulation problems.Krupa Koestline is a cosmetic chemist and the founder and lead consultant of KKT Consultants, which works with beauty brands on developing formulas. ![]() The good news? Throwing out old makeup just makes room for a brand new haul - and since you're being so diligent about making sure your makeup is in tip-top shape, that definitely means you deserve to go shopping. Ahead, find out how to tell when it's time to toss that favorite face powder, blush, mascara, nail polish, and more right out of your makeup kit. "It is an indication of how many months a product may be used without preservation, physical, and/or chemical degradation, which would lead to micro-organism contamination, decrease in efficacy, or harm to the consumer."ĭifferent types of makeup products, like different types of hair products, can "age" differently, so we spoke to the experts to learn how to tell what's still good and what's past its prime. "PAO, indicated by an open-jar symbol, was first was adopted by the EU commission in 2003 and quickly became best practice throughout the cosmetic industry," explains Athena Teschendorf, the development and regulatory affairs manager for SOS Beauty. More, however, feature a symbol that reflects the PAO or period after opening. So what's your first course of action? Check for an expiration date on the label - some, though not many, products include this. Since most of us are not cosmetic chemists, we can't be expected to be able to easily identify those preservatives. "A good preservative is broad-spectrum, which means it acts against bacteria and yeast, as well as mold." "Preservative systems are extremely important to make sure a product is safe for use," explains cosmetic chemist Krupa Koestline. So how do you know if your makeup has expired? Much of what makes or breaks the longevity of a makeup product boils down to preservatives.
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