Consuming too much carrot juice may lead to a condition called carotenosis in which the skin turns a yellowish orange color, primarily on the nose, palms and soles. Most of the time, this condition causes no harm, but sometimes the carotenosis that occurs as a result from drinking large amounts of carrot juice indicates a more serious medical condition called hypervitaminosis A. Carotenosis is also known as carotenemia, xanthemia and xanthosis.
While the National Institutes of Health has published a study that shows carrot juice protects the cardiovascular system by increasing total antioxidant status and decreasing lipid peroxidation, too much carrot juice may have consequences beyond the skin discoloration. When carotenosis develops into hypervitaminosis A, other symptoms may occur, including blurred vision, bone pain and dizziness. Hypervitaminosis A may be fatal if untreated by a physician. Fortunately, treating carotenosis often leads to a complete recovery, even when it has developed into hypervitaminosis A. Decreasing the intake of foods containing vitamin A or beta-carotene gets rid of the symptoms as well as the skin discoloration. People who take beta-carotene supplements may need to reduce or eliminate their intake of the supplement because it contributes to carotenosis; when this occurs, one should simply aim to get the daily recommended dose of vitamin A.