What causes them? Brittle nails often result from dryness, excessive hardness, or nutritional deficiencies.
What to do: Keep nails short during breakage. Always apply a base coat, with or without polish. Take nail and hair supplements once or twice a year.
Recommended products: Hair & Nails capsules by Imedeen, €35. Hair Fortifier by Oenobiol, €7.35.
What causes them? Often genetic, but also due to vitamin or mineral deficiencies. Aggravated by harsh cleaning products or acetone-based removers.
What to do: Use a hardener varnish daily; remove every three days and restart. Hair-strengthening capsules also help.
Recommended products: Nail Hardener by Mavala Scientifique, €14.90. Nail Envy by O.P.I. at Sephora, €28.50.
