Larch Arabinogalactan

Probiotics & Prebiotics

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.

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What the research says

Common dosages

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

Common supplement forms

Larix occidentalis extract
Medical Disclaimer: Noyemi provides information from published research for educational purposes only. This content is not medical advice and does not replace consultation with a qualified healthcare provider. Always consult your doctor before starting, stopping, or changing any supplement regimen, especially if you take medications or have existing health conditions.