Vitamin C
Vitamin C contains a lot of antioxidants, which can be effective in reducing the severity or length of colds. As a result, it will help alleviate some symptoms of your nasal congestion. The recommended dosage is around 500 milligrams on a daily basis. Avoid exceeding 100 milligrams as it might reverse the effects and lead to some serious health issues. Also, if you are suffering from kidney disease, avoid taking vitamin C supplements. [4]
