Vitamin C 1,000 mg (or more) daily no specific manufacturer $2 monthly

Many studied now document the effectiveness of Vitamin C to improve immunity. It is also an anti-oxidant, and studies suggest cardiovascular protection from it’s action.  Lower levels of Vitamin C have a 57% higher mortality. And a 62 % higher risk of cancer deaths. You can’t get this from other sources you would have to eat 17 oranges a day or take 10 multi-vitamins to get this dosage, hence it is listed separately.