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Strengthen Your Weak-Ass Nails

Need some nail rehab? Find out what could be making them split and break, and follow these expert-approved tips and product suggestions to get them back into tip-top shape.

| November 13th, 2013
Brittle Nail Rehab

With nail art frenzy in full force, chances are you are paying more attention to your fingertips than ever before and how they measure up against the latest DIY manicures your friends are Instagramming. Which means you’re probably very in tune with the imperfections that make your canvas not so ideal for your newest paint job. Splitting, breaking, peeling—there’s a lot of things that can go wrong. But why?

A quick science lesson: Nails are composed of very small cells called onychocytes, which are mainly made up of keratin, says Dana Stern, M.D., a New York City-based dermatologist who specializes in nails and nail disorders. “If you were to look at the nail under a microscope, it actually looks almost like layered roof shingles. So these cells are very delicate and the nail is actually extremely absorptive,” she says. “It’s about 10 times more absorbent than skin.” Which is why when you take a long bath, your nails get super soft and bendy.

It’s important to note that if your nails become extremely brittle out of nowhere, it could be a sign of a health issue, such as anemia, or a thyroid condition, says Stern. If that’s the case, you should see your doctor. In addition, those who suffer from an eating disorder or are undergoing chemotherapy may have chronic brittleness due to severe protein deficiency. If you don’t have any of these health woes but have had weak nails for as long as you can remember, it could be genetic. “If your mother has brittle nails there’s a good chance you’re going to have them, too,” Stern notes.

Nails’ absorbent nature also makes them susceptible to many external factors, all of which can cause them to break and split. Here are the three biggest culprits that Stern notes could be messing with your nails:

Water Exposure
When you wash your hands or take a bath—or even get a manicure—water is absorbed into your nails. Then eventually, that water diffuses back out. This constant change in water content causes the cells to expand and contract, straining them as they continually change size to accommodate more or less water.

Seasonal Weather Changes
In the winter, your days are spent going from a 70-degree indoor environment to a cold, below-freezing outdoor environment. And with the changing temperature comes varying levels of humidity. Just like your body temperature adjusts to these dramatic temperature fluxes, so do your nails. “The water content of the ambient environment is in flux, and so is the water content of our nails,” Stern says, which causes the same type of strain and weakening that water exposure does.

Chemical Exposure
From this point forward, consider nail polish remover the enemy. “Polish remover is really a solvent—it’s strong, almost like a paint thinner—and it really dries out the nail,” Stern says. The most offensive chemical is acetone, but that doesn’t mean non-acetone removers are a whole lot better. “The non-acetone version requires more of the liquid and more exposure time,” she points out. So although it’s not as harsh, drenching your nails in more product and rubbing more aggressively to remove stubborn polish is still damaging. No formal study has been done on which is actually better, but Stern suggests that forgoing acetone might be the better route.

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