complexe ongles parfaitsThe nail is made of keratin, a fibrous protein that can easily be weakened by daily physical and chemical aggressions: cold, water, chemicals, shocks, etc. The condition of our nails can also say a lot about our health. A change in the appearance, texture, or shape of the nails may indicate nutrient deficiencies. In general, soft, brittle, ridged, or split nails are a sign of zinc, iron, vitamin B, and selenium deficiency. The Perfect Nails Complex