Larch arabinogalactan is a naturally occurring polysaccharide fiber extracted from the wood of the Western larch tree (Larix occidentalis), widely recognized for its prebiotic and immune-modulating properties. Research suggests it supports gut health by promoting the growth of beneficial bacteria such as Lactobacillus and Bifidobacterium, while also increasing the production of short-chain fatty acids like butyrate, which play a key role in maintaining intestinal integrity. Studies indicate that larch arabinogalactan may enhance immune function by stimulating natural killer cell activity and supporting the body's response to common upper respiratory infections, with some clinical trials noting a reduction in the frequency and duration of cold episodes. As a well-tolerated, water-soluble fiber, it has drawn interest as both a gentle prebiotic and a complementary approach to seasonal immune support.
Compare this supplementResearch suggests that larch arabinogalactan may support immune function through several proposed pathways, including...
View studies →Research suggests that larch arabinogalactan may support gut health in part by serving as a fermentable substrate for...
View studies →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Powder | 1.5 g | Three times daily | cold and flu prevention | Dosing regimen used in RCTs on upper respiratory tract infections |
| Powder | 10–30 g | Daily | general immune and gut health in adults | Broader range noted in longer-term tolerability and safety studies |
| Powder | 4.5–9 g | Daily | gut health and prebiotic support | Higher doses used in gut microbiota and fiber studies |
| Powder | 1.5–4.5 g | Daily | immune function and cold/flu support | Common in clinical trials studying immune modulation |