Crossword Genius

Substance of which hair and fingernails are composed (7)

Ross

I believe the answer is:

keratin

(Other definitions for keratin that I've seen before include "Hair, nails substance" , "Material in hooves and nails" , "Constituent of hair/nails" , "Rate ink (anag) - fibrous protein" , "Protein found in hair and nails" .)

I've seen this clue in The Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.