Sources of Vitamin C
Since our bodies do not produce Vitamin C, it is imperative we get it from other sources.
The ideal way is to eat fruits and vegetables that are high in Vitamin C content.

The Vitamin C content in most fruit is higher when it is slightly immature, and declines as the fruit hits peak ripeness. Some of the fruit sources include:

Supplementing Your Dietary Intake
Most people do not eat the recommended 5 fruits and vegetables a day and do not consume an adequate amount of Vitamin C. In these instances, a supplement may be beneficial.

As with any supplement, taking large doses of Vitamin C should be discussed with your physician. A daily dose of 1000 to 4000 milligrams may help reduce the severity of sinus stuffiness and runny nose.