When I start to feel sick I take Vitamin C and it shortens my cold.
Its so good for you! It's  also known as ascorbic acid and -ascorbic acid, is a vitamin found in food and included as a dietary supplement.
How much should an average weight adult take per day?
I'm not actually sure but i know large doses may cause gastrointestinal discomfort, headache, insomnia, and flushing of the skin.
Wow. I guess it's important to make sure you don't overdose on it!
Definitely! also Its unclear if supplementation affects the risk of cancer, cardiovascular disease, or dementia.
How else can you get Vitamin C other then in a pill?
Good question! It can be taken by mouth or by injection.
What foods is it present in?
, 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
Vitamin C
Vitamin C, also known as ascorbic acid and -ascorbic acid, is a vitamin found in various foods and sold as a dietary supplement. It is used to prevent and treat scurvy. Vitamin C is an essential nutrient involved in the repair of tissue and the enzymatic production of certain neurotransmitters. It is required for the functioning of several enzymes and is important for immune system function. It also functions as an antioxidant. 
Current evidence does not support its use for the prevention of the common cold. There is