The human immune system is very complex and intricate. It needs many nutrients to function optimally. The Fab 5 include Vitamin C, Zinc, Vitamin D, Vitamin A and Selenium. These are just tip of the spear & many other nutrients to function optimally. A strong immune system can protect us from any pathogen (virus, bacteria, fungus or parasites). Sugar weakens the immune system as does excess weight, stress, lack of exercise or extreme exercise.
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