Talk with a healthcare provider if brittle nails are an ongoing problem. Hypothyroidism (in which the thyroid works too slowly) also causes brittle nails. Try using a super-moisturizing lotion to ...

Otherwise, with overuse, nails may become brittle. Deborah Lippmann Hard Rock ... t any underlying issues like a nutrient deficiency or thyroid problem." ...

And while healthy-looking nails sit high on most of our beauty wishlists, that constant maintenance can contribute to weak, peeling nails. Yes, it's counterintuitive, but it's true nonetheless.