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Compound Derived From Larch Tree Bark Boosts Immune Response To Pneumonia Vaccine

August 26, 2010: 06:35 AM EST
A placebo-controlled study among healthy adults has found that an extract of the water-soluble polysaccharide arabinogalactan – derived from larch tree bark and commercially known as ResistAid – significantly boosts the ability of pneumonia vaccine to strengthen the immune system. Forty-five adults ingested either a 4.5 mg dose of ResistAid or a placebo for 72 days. Thirty days into the study all participants were given a pneumonia vaccine. The researchers then measured various indicators of immune system response (e.g., white blood cell counts, inflammatory cytokines, etc.) and found that pneumococcal antibody response in the arabinogalactan group was significantly higher than in the placebo group, indicating that the immune system was enhanced by the vaccine plus the arabinogalactan supplement.
Jay K Udani, Betsy B Singh, Marilyn L Barrett and Vijay J Singh, "Proprietary arabinogalactan extract increases antibody response to the pneumonia vaccine: a randomized, double-blind, placebo-controlled, pilot study in healthy volunteers", Nutrition Journal , August 26, 2010, © BioMed Central Ltd
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