Definition: Keratin is a tough, fibrous, insoluble protein that makes up skin, hair, and nails.
Pronunciation: KER-uh-tin - (noun)
Keratin
From Heather Brannon, MD, former About.com Guide
Updated October 23, 2004
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
See More About:
Suggested Reading
Glossary Words - K
Explore Dermatology
Must Reads
Most Popular
