Re: Vitamins to Raise Immunity
Some recs. that have worked for myself and others:
Wholly Immune from Allergy Research Group (you can get this from some Vitamin Shoppe -- it's expensive but it works).
Source Naturals Wellness Formula
Planetary Formulas Yin Chiao and Echinacea Complex. Yin Chaio is truly magical stuff. It has helped me quickly recover from colds and respitory infection many times.
You may also want to try CoQ10, and alpha lipoic acid, which help boost the immune system.