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Lag3.6

Larch Arabinogalactan Research

Mostly mechanism / observational

7 peer-reviewed studies

What the evidence says

Mostly mechanism / observational

Most Larch Arabinogalactan studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.

Most evidence is from medium-quality randomised trials published 2010–2026 with a typical study size of 199 participants.

Based on 7 studies · 3 RCTs · 244 total participants

Confidence

Moderate confidence

By outcome

Immune supportEnhanced antibody response to vaccines and a modest reduction in common-cold incidence in small RCTs · 4-12 weeks
Too few graded studies2 studies
Safety profile
Too few graded studies1 study

Active research area

4 studies in the last 5 years

201020182026

1RCT2013

Udani JK · J Am Coll Nutr (2013)

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2Review2024

In plain English: This review discusses the main structural characteristics of polysaccharides from exudate gums of plants and their interactions with the intestinal microbiota.

Silva FCO, Malaisamy A, Cahú TB, de Araújo MIF, Soares PAG, Vieira AT, Dos Santos Correia MT. · International journal of biological macromolecules (2024)

The structural features of polysaccharides confer the ability to be exploited in different industrial sectors and applications involving biological systems.
This review discusses the main structural characteristics of polysaccharides from exudate gums of plants and their interactions with the intestinal microbiota.
Further research warranted to confirm findings

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3Review2026

In plain English: By summarizing current findings, the review highlights future research directions for exploiting AGPs as valuable yet underexplored, plant-derived ingredients in health-oriented food development.

Zając A, Leszczuk A, Kutyrieva-Nowak N, Kalaitzis P. · The Journal of nutrition (2026)

Present across botanically diverse species and environmental contexts, AGPs exhibit a wide range of physiological effects, including immunomodulatory, anti-inflammatory, antioxidant, antihyperglycemic, antiproliferative, and antiallergenic activities.
This review offers a comprehensive overview of the therapeutic and nutritional potential of AGPs, emphasizing their structural diversity and emerging role as bioactive components in functional foods.
Special focus is placed on their mechanisms of action and potential applications in nutraceuticals and biotechnological innovations.

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4RCT2024

In plain English: Conclusion Arabinogalactan-rich Hyuganatsu juice suppressed bone mineral turnover and potentially improved ovarian hormone deficiency-induced osteoporosis in postmenopausal women.

Yamaguchi M, Yoshiyama T, Maruyama R, Ohashi M, Nishizono S, Kobayashi T, Miyatake M, Sameshima H. · The journal of obstetrics and gynaecology research (2024)

Cumulative effects were compared between groups using repeated-measures linear mixed model analysis.
The primary endpoint was the difference between the pre- and post-intervention TRACP5b and P1NP levels.
Conclusion Arabinogalactan-rich Hyuganatsu juice suppressed bone mineral turnover and potentially improved ovarian hormone deficiency-induced osteoporosis in postmenopausal women.

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5RCTn=199 · medium study2013

In plain English: Over 12 weeks, larch arabinogalactan 4.5 g/day significantly reduced the number of participants affected by a common cold versus placebo.

Riede L, Grube B, Gruenwald J. · Curr Med Res Opin (2013)

Significantly fewer participants affected by a cold with arabinogalactan (p = 0.038 FAS; p = 0.033 per-protocol)
Cold incidence reduction was borderline in the full analysis set (p = 0.055) but significant per-protocol (p = 0.040)
Well tolerated with no significant differences in adverse events

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6Pilotn=45 · small study2010

In plain English: Larch arabinogalactan 4.5 g/day increased the IgG antibody response to the 23-valent pneumococcal vaccine versus placebo in two antibody subtypes.

Udani JK, Singh BB, Barrett ML, Singh VJ. · Nutr J (2010)

Significantly greater IgG response in pneumococcal subtypes 18C and 23F at days 51 and 72 (p < 0.05)
Other subtypes trended higher but did not reach significance
No effect on salivary IgA, white blood cell count, cytokines, or complement

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7In Vitro2023

In plain English: In an in-vitro fermentation model, arabinogalactan lowered fermentation pH, increased short-chain fatty acids, and enriched Bifidobacterium and Lactobacillus.

Liu F, Chen S, Dong D, et al. · Food Funct (2023)

Arabinogalactan-containing biscuits had the lowest estimated glycemic index of the fibers tested
Decreased fermentation pH and increased short-chain fatty acid levels
Increased abundance of Bifidobacterium and Lactobacillus in both diabetic and healthy fecal microbiota

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View in Research Library

Larch Arabinogalactan Research

Mostly mechanism / observational

Immunomodulatory effects of ResistAid™: A randomized, double-blind, placebo-controlled, multidose study.

Polysaccharides from exudate gums of plants and interactions with the intestinal microbiota: A review of vegetal biopolymers and prediction of their prebiotic potential

Glycoproteins and Arabinogalactan Proteins: Emerging Functional Ingredients in Nutrition and Human Health

Citrus tamurana Hort. ex Tanaka (Hyuganatsu orange)-derived arabinogalactan suppresses bone turnover in postmenopausal women: A randomized placebo-controlled study

Larch arabinogalactan effects on reducing incidence of upper respiratory infections.

Proprietary arabinogalactan extract increases antibody response to the pneumonia vaccine: a randomized, double-blind, placebo-controlled, pilot study in healthy volunteers.

Effects of xanthan gum, konjac glucomannan, and arabinogalactan on the in vitro digestion and fermentation characteristics of biscuits.