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Friday, January 28, 2011Publications

Why are cosmetics becoming less efficient?

©Thinkstock - L'Observatoire des Cosmétiques

You've probably noticed that, at least once. One day --a gloomy one, for sure!-- this product that you like so much, this lotion, this shampoo, this moisturizing care that was nothing less than magic, suddenly loses its magic … It does not make it anymore, results are no longer there. Did the product change or is it just an hypothesis? U.S. researchers yield some clues to understanding this strange phenomenon …

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January 28, 2011
No, you're not dreaming … and you are right: this cosmetic product you liked so much, that gave you so much pleasure, is no longer as good as it was. Well, what did happen?

The likely explanations

Food for thought number one : You've modified your habits. "People scrupulously use a product at first," says April Armstrong, an assistant professor of dermatology in the University of California. "However, one makes some adaptation of his own along the time." And when one doesn't apply, say, an anti-aging serum or an acne lotion the way i should, results are not there.
Food of thought number two : The product has been used for too long a time. For example, silicone -based hair products can build up, causing hair fibers to react differently to them after a while, according to Carmine Minardi, a co-owner of the Minardi Salon, in New York City.
Other possibilities : "Changes in diet, climate, and your hormones may subtly affect the way a product responds," says Ni'Kita Wilson, a cosmetic chemist in Fairfield, New Jersey. So the oil-free moisturizer that did the job in humid summer months may not offer enough hydration …

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