Keratin Keratin: a fibrous protein that makes up the structure of nails and hair.Related Articles: pH in Nail Care Explained: A Guide for Nail ProfessionalsThe Impact of Peel-Off Basecoats on Nail HealthMyth: External Application of Vitamins and Nutrients for Stronger, Healthier NailsCan Nail Oils Really Help Nails Grow Faster?Understanding Polymer-Based Nail Hardeners
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