Vitamin C is great when you feel yourself getting sick.
I agree, evidence suggests it can shorten the length of your cold.
Yes, I believe if you take it right when your symptoms develop, am I right?
Yes, and avoid large doses because they can cause gastrointestinal discomfort, headache, trouble sleeping, and flushing of the skin.
That is good to know. I'd hate to get sick trying to make myself feel better!
, and strawberries. Prolonged storage or cooking may reduce vitamin C content in foods. 
Biology.
Biology Significance.
Vitamin C is an essential nutrient for certain animals including humans. The term "vitamin C" encompasses several vitamers that have vitamin C activity in animals. Ascorbate salts such as sodium ascorbate and calcium ascorbate are used in some dietary supplements. These release ascorbate upon digestion. Ascorbate and ascorbic acid are both naturally present in the body, since the forms interconvert according to pH. Oxidized forms of the molecule such as
, however, some evidence that regular use may shorten the length of colds. It is unclear whether supplementation affects the risk of cancer, cardiovascular disease, or dementia. It may be taken by mouth or by injection.
Vitamin C is generally well tolerated. Large doses may cause gastrointestinal discomfort, headache, trouble sleeping, and flushing of the skin. Normal doses are safe during pregnancy. The United States Institute of Medicine recommends against taking large doses.
Vitamin C was discovered in 1912, isolated in 1928, and