It has about one-third the density and stiffness of steel; it is ductile and can be easily machined. Naturally, pure aluminum reacts readily with oxygen in air creating a thin barrier oxide layer known as the aluminum oxide next to the metal surface that is about 2-3 nanometers thick.
Orange skin resulting from excessive carrot consumption sounds like something out of a science fiction novel or a bizarre comedy. However, the fact is that yellow skin pigmentation resulting from increased beta-carotene levels in the blood is a real clinical condition called carotenemia. Though carotenemia is harmless, it's easy to confuse with jaundice in young children.
Vitamins and supplements If you take B vitamins, high doses of vitamin C, or beta carotene, this might turn your urine bright yellow or orange. Beta carotene, which your body converts to vitamin A, is the substance that makes carrots and other vegetables orange, so it stands to reason that it could affect your urine as well! Even eating foods rich in beta carotene could change your urine to a darker yellow or orange color.