Micronutrients. Where carrots really shine is as a source of vitamin A. One cup of carrots provides a whopping 428 percent of the recommended daily intake. Other micronutrients found in carrots include calcium, thiamin, niacin, iron, vitamin B-6, vitamin E, riboflavin, folate, manganese, vitamin C, vitamin K, choline, phosphorus and potassium. A 1-cup serving of raw carrots also provides 4 grams of fiber.