Evidence supporting the use of: Larch arabinogalactan
For the health condition: Infection (viral)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Larch arabinogalactan is a polysaccharide derived from the bark of the larch tree (Larix species) and is sometimes promoted for immune support, including for viral infections. There is modest scientific evidence suggesting that larch arabinogalactan may have immunomodulatory effects. Some in vitro and animal studies indicate it can enhance natural killer (NK) cell activity and increase the production of certain cytokines, which could theoretically help the body respond to viral challenges. A few small human clinical trials have explored its effects on the immune system. For example, a randomized, double-blind, placebo-controlled study published in "Nutrition Journal" in 2010 found that healthy adults taking larch arabinogalactan had a reduced incidence of common cold infections compared to placebo, suggesting a potential preventive benefit.

However, the overall quality and quantity of clinical evidence remain limited. Most studies are small, short in duration, and focus on surrogate immune markers rather than robust clinical outcomes in viral infections. Systematic reviews have noted that while there is some support for immunostimulatory properties, more rigorous research is needed to confirm its efficacy in preventing or treating viral infections in humans. Thus, while there is some scientific rationale and preliminary evidence behind the use of larch arabinogalactan for supporting resistance to viral infections, the evidence is not strong or conclusive.

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Products containing Larch arabinogalactan

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