Vitamin C : Everyone needs vitamin c; vit. C deficiency leads to poor immune function. High doses, esp. Iv, can help treat many infections. See http://www.Leaflady.Org/more2c.Htm echinacea appears to help us fight colds but is not appropriate for everyone; it can aggravate certain autoimmune diseases like rheumatoid arthritis & interact with certain meds. See http://www.Rxlist.Com/echinacea/supplements.Htm.
Answered 12/10/2013
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