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! Cardiovascular death is reduced 42%in men and 25% in women with high dose therapy! ! Part of its mechanism is to protect “bad cholesterol” from oxidation (inflammatory damage).  Vitamin C reduces LDL cholesterol from being oxidized by 75%!   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 of 1000 mg daily (or more).