Some say megadoses (eating many times the recommended amount) of vitamin C helps to shorten the duration of the common cold. This is not true. Moderately increasing your vitamin C levels when you have a cold may help to slightly reduce a cold's duration. Drinking orange juice does help by increasing your fluid intake, and a little extra vitamin C may help. http://en.wikipedia.org/wiki/Vitamin_C
Chronic low blood levels of vitamin C have been linked with the development of atherosclerosis, or thickening of artery walls by cholesterol that may lead to heart problems. http://en.wikipedia.org/wiki/Vitamin_C
One Canadian study found that low levels of vitamin C were linked to higher waist circumference, body mass index, and blood pressure. http://www.anh-europe.org/news/vitamin-c-deficiency-worse-than-feared-research-news
One problem with increasing vitamin C consumption is one of the most common methods to do this involves drinking more juice and therefore getting possibly unneeded extra calories. Whole foods will provide the vitamin C we need when we know which ones have high levels of the vitamin. (see beginning paragraph for ideas.)
Make sure and get your vitamin C today!