As root vegetables that spread from the Middle East to Greece, Rome and later Europe, the earliest carrots were not orange, but multicolored.
Of course, carrots are full of carotenoids, the group of plant pigments of which beta-carotene is a member. They're also a source of disease-fighting flavonoids, and a fiber called calcium pectate which may lower blood cholesterol.
Glycemic Index=47
Glycemic Load=3
Antioxidant Score* (ORAC)=666 (raw) and 317 (cooked)