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Larch Arabinogalactan


Larch is a tree that grows in North America. Arabinogalactan is a compound found in the bark of the larch tree. Larch arabinogalactan has been used to help the body fight off infection. It can be taken as a powder.


4 to 8 grams once daily

What Research Shows

May Be Effective

  • Common cold —may improve symptoms and fight off illnessA1

Editorial process and description of evidence categories can be found at EBSCO NAT Editorial Process.

Safety Notes

It is likely safe to take larch arabinogalactan for a short time. Not enough studies have been done to say whether it is safe to take for a long period or by women who are pregnant or breastfeeding.


Talk to your doctor about any supplements or therapy you would like to use. Some can interfere with treatment or make conditions worse.



A1. Riede L, Grube B, et al. Larch arabinogalactan effects on reducing incidence of upper respiratory infections. Curr Med Red Opin. 2013;29(3):251-258.

Last reviewed March 2020 by EBSCO NAT Review Board Eric Hurwitz, DC  Last Updated: 6/22/2020