Vitamin C is sensitive to light, air and heat.
I guess not guess since at least vitamin C and B6 are sensitive to heat
Vitamin C, a water soluble vitamin, is easily destroyed under heat.
Vitamin A, Vitamin B12, Vitamin D, Folic Acid, Vitamin K, Vitamin E, Pyridoxine, Riboflavin
The age of a vegetable does not affect the vitamin C content. However, vitamin C can be destroyed by heat.
The heat from the microwaving destroys some of the Vitamin C.
the vitamin c gets oxidized and will lose its antioxidant abilities.
Vitamin C is sensitive for temperature and sodium hydrogen carbonate. When heated for a very long time, the amount of vitamin C will decrease. When heated at a constant temperature with a concentration of sodium hydrogen carbonate, more vitamin C will be lost.
Vitamin C is highly sensitive to air, water, and temperature. Crystalline substances, including vitamin C, some vitamin B forms and other dietary supplements, are prone to a process called deliquescence, where humidity causes a water-soluble solid to dissolve and leach out of the vitamins. Exposure to elevated temperatures accelerates the degradation of vitamin C and destroys its ability to act as an anti-oxidant or otherwise provide any benefit. While vitamin C can degrade even without the oxygen in air, exposure to air is usually part of the process of degrading it. Even if it it packaged in nitrogen, as soon as a package is opened, it is exposed to the oxygen in the air and begins to degrade. Exposure to light can also hasten the degradation of vitamin C. Maximum storage time requires keeping vitamin C cool, dry, away from oxygen and away from light.
No, in fact Vitamin C itself acts like a preservative to a certain extent. Note that excessive light or heat will break down Vitamin C.
Boiled fruit can contain less Vitamin C for a couple reasons. The first reason is damage to the Vitamin C chemical structure. Heat easily destroys Vitamin C. The boiling of fruit introduces the Vitamin C to heat. The second reason is leeching. When you cook using "wet" methods (cooking procedures using water or other liquid) the vitamins and minerals can literally leak out of the fruit and into the surrounding water/liquid.
Vitamin C is the most unstable vitamin which can be easily denatured. It should be kept at under 70 degree Celsius to avoid damage caused by the heat.