Scientists have developed a forensic test that can predict both the hair and eye colour of a possible suspect using DNA left at a crime scene.

BBC: Forensic test can predict hair and eye colour from DNA

From the moment they were born, they looked like her or they looked like their father, or, sometimes, they looked like a combination of both: her hair and his eyes, his mouth and her nose, her chin and his smile.

NEWYORKER: M&M World

Eggs also provide biotin, a structural component of both bone and hair.

CNN: What you eat can improve your health, mind, and appearance