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Dr. Michelle Wong
Cosmetic Chemist

Duri
Rejuvacote
$14.00

Duri Rejuvacote contains formaldehyde. A lot of people are scared of formaldehyde, but it’s not that dangerous. The main thing that formaldehyde does is strengthen your nails because it forms extra chemical bonds in between the nail protein fibers. So if your nails are weak, brittle, and flaky, it can really help with that and make your nails stronger.

In general, if you use it in a well-ventilated area and try not to breathe it in too much, it’s pretty safe. I don’t, however, recommend it to pregnant women. For people who are just doing their nails at home, it’s pretty low risk. But if you’re a nail salon worker, for example, you should be much more careful about ventilation.

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