When they were first cultivated, carrots were grown for their aromatic leaves and seeds rather than their roots. Carrot seeds have been found in Switzerland and Southern Germany dating to 2000–3000 BC. Some close relatives of the carrot are still grown for their leaves and seeds, for example parsley, fennel, dill and cumin. The first mention of the root in classical sources is during the 1st century. The plant appears to have been introduced into Europe via Spain by the Moors in the 8th century, and in the 10th century, in such locations in West Asia, India and Europe, the roots were purple. The modern carrot originated in Afghanistan at about this time. The Jewish scholar Simeon Seth describes both red and yellow carrots in the 11th century. The 12th-century Arab Andalusian agriculturist, Ibn al-'Awwam, also mentions roots of these colours; Cultivated carrots appeared in China in the 14th century, and in Japan in the 18th century. Orange-coloured carrots appeared in the Netherlands in the 17th century, which has been related to the fact that the Dutch flag at the time, the Prince's Flag, included orange. These, the modern carrots, were intended by the antiquary John Aubrey (1626–1697) when he noted in his memoranda "Carrots were first sown at Beckington in Somersetshire. Some very old Man there [in 1668] did remember their first bringing hither." European settlers introduced the carrot to Colonial America in the 17th century.

Since the late 1980s, baby carrots or mini carrots, carrots that have been chopped and peeled into uniform 2-inch (5 cm) cylinders, have been a popular ready-to-eat snack food in U.S. supermarkets.

The carrot gets its characteristic, bright orange colour from β-carotene.

Carrot Nutrition Facts: Calories, Carbs, and Health Benefits

The composition of carrot is 88.29% water, 9.58% carbohydrates, 0.93% protein, 2.8% dietary fiber, and 0.24% fat. If you consume one medium carrot you will get 5.844 grams of carbohydrates. It is equal to 4.5 percent of the 130 grams of carbohydrates you should include in your daily diet. That same it has an energy value of 173 kJ (41 Calories) in a 100 g (3.5 Oz) amount and is a very good source of Vitamin A (total, RAE) (119.29% of the Daily Value). So if your diet contains carrot, it helps your body to reduce the risk of lung and prostate cancer, trap pathogenic bacteria, keep your immune system healthy and it is effective against night blindness or nyctalopia which is caused by vitamin A deficiency, development of acne due to excess secretion from sebaceous glands and bacterial infections. It contains low amount of minerals.