Carotene vs keratin

Carotene and keratin are both important biological compounds but serve different functions. Carotene is a pigment found in plants and some microorganisms, responsible for the yellow, orange, and red colors of fruits and vegetables; it is also a precursor to vitamin A. In contrast, keratin is a fibrous structural protein found in hair, nails, and the outer layer of skin in animals, providing strength and resilience. While carotene plays a role in nutrition and pigmentation, keratin is crucial for protection and structural integrity.