By Yousry Naguib, Ph.D.
Vitamin C - Research studies demonstrated that Vitamin C is a potent antioxidant protecting against free radical damage, and has the ability to boost interferon (a natural antiviral substance) and antibodies levels in the body, and hence maintaining a strong immune system to alleviate allergy symptoms.
Zinc - Test tube studies showed that zinc might prevent cold viruses from reproducing themselves. Its beneficial effects in preventing or treating cold in humans has been demonstrated in only five out of eleven double-blind, placebo-controlled studies.
Quercetin, a bioflavonoid, is anti-histaminic and anti-allergic. It was shown to inhibit mast cells from releasing inflammatory compounds.
Butterbur (Petasites hybridus) - extracts of butterbur have been used in bronchial asthma, and studies have shown that they inhibit the biosynthesis of the inflammatory leukotrienes.
Elderberry (Sambucus nigra) has been popular since ancient Egypt. Both the flowers and berries ease the congestion and inflammation associated with hay fever.
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