Home Ingredients ResistAid® (Larch Arabinogalactan — Lonza)
Immune SupportGut Health

ResistAid® (Larch Arabinogalactan — Lonza)

Larix occidentalis
Evidence Level
Strong
3 Clinical Trials
6 Documented Benefits
4/5 Evidence Score

ResistAid® is a STANDARDIZED LARCH ARABINOGALACTAN ingredient developed by Lonza — sustainably-sourced from North American larch trees (Larix occidentalis) using a water-based extraction method. Distinguished by clinical evidence for immune support including reduced cold/flu incidence, gut microbiome modulation, and prebiotic effects. Used for: immune system support, gut health, prebiotic fiber, antibody response enhancement.

Studied Dose 1.5-4.5 g/day ResistAid (research-validated)
Active Compound Arabinogalactan polysaccharide from Larix occidentalis larch

Benefits

Cold and Flu Incidence Reduction

Multiple ResistAid RCTs show reduced incidence of cold and flu symptoms in healthy adults. Riede 2013 (Curr Med Res Opin) showed 23% fewer cold episodes in ResistAid group vs placebo.

Supported by Trial 1

Antibody Response Enhancement

ResistAid shown to enhance antibody response to vaccination (pneumococcal vaccine response improved); supports adaptive immune function.

Supported by Trial 2

Gut Microbiome Modulation

Recent studies show ResistAid positively modulates gut microbiome — increases beneficial bacteria (Bifidobacterium, Lactobacillus); prebiotic effect.

Supported by Trial 3

NK Cell Activity Enhancement

Activates natural killer cells — first-line innate immunity defense against viruses and abnormal cells.

Supported by Trial 2

Sustainable Larch Source

Larch arabinogalactan extracted from sustainably-sourced North American larch chips using water-based extraction (no chemical solvents). Clean-label positioning.

Soluble Fiber / Prebiotic

ResistAid is a soluble fiber that bypasses upper GI digestion; fermented in colon by beneficial bacteria producing short-chain fatty acids (especially butyrate).

Supported by Trial 3

Mechanism of action

1

Innate Immune Activation

Arabinogalactan binds to immune cell receptors; activates macrophages, dendritic cells, NK cells; enhances first-line immune response.

2

Adaptive Immune Support

ResistAid enhances B-cell antibody production — improved adaptive immune response to pathogens and vaccines.

3

Prebiotic Fermentation

Soluble fiber resists upper GI digestion; fermented in colon by beneficial bacteria; produces short-chain fatty acids supporting gut barrier and gut-immune axis.

4

Gut Microbiome Modulation

Selective stimulation of beneficial bacteria (Bifidobacterium, Lactobacillus); shifts microbiome composition toward healthier profile.

5

Larch Source Distinction

Larch arabinogalactan distinct from acacia gum arabic — different polysaccharide structure; specific immune evidence base.

Clinical trials

1
ResistAid for Cold Incidence — Riede 2013
PubMed

RCT of ResistAid 4.5 g/day for 12 weeks during cold season in healthy adults.

199 healthy adults during cold season.

23% fewer cold episodes in ResistAid group vs placebo. Established cold prevention evidence.

2
ResistAid for Antibody Response — Udani 2010
PubMed

RCT of ResistAid effects on pneumococcal vaccine antibody response.

Adults receiving pneumococcal vaccine.

Enhanced antibody response to vaccine in ResistAid group. Established adaptive immunity support.

3
ResistAid Gut Microbiome Study
PubMed

Recent study on ResistAid's effects on gut microbiome composition and immune markers.

Healthy adults.

Positive modulation of gut microbiome; increased beneficial bacteria; supportive immune markers.

Side effects and drug interactions

Common Potential side effects

Generally extremely well-tolerated.
Mild GI distress (gas, bloating) at high doses — typical of soluble fiber adjustment.
Allergic reactions to larch rare.
Self-affirmed GRAS status.

Important Drug interactions

Generally minimal drug interactions.
Immunosuppressants — theoretical concern with immune-activating ingredients; consult.
Antibiotics — generally complementary; may help restore gut microbiome after antibiotic courses.
Pregnancy — generally considered safe; limited specific data.
Lactation — generally considered safe.
Children — safe at appropriate proportional doses; ResistAid studied in pediatric immune support.

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Frequently asked questions about ResistAid® (Larch Arabinogalactan — Lonza)

What is the recommended dosage of ResistAid® (Larch Arabinogalactan — Lonza)?

The clinically studied dose for ResistAid® (Larch Arabinogalactan — Lonza) is 1.5-4.5 g/day ResistAid (research-validated). Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is ResistAid® (Larch Arabinogalactan — Lonza) used for?

ResistAid® (Larch Arabinogalactan — Lonza) is studied for cold and flu incidence reduction, antibody response enhancement, gut microbiome modulation. Multiple ResistAid RCTs show reduced incidence of cold and flu symptoms in healthy adults. Riede 2013 (Curr Med Res Opin) showed 23% fewer cold episodes in ResistAid group vs placebo.

Are there side effects from taking ResistAid® (Larch Arabinogalactan — Lonza)?

Reported potential side effects may include: Generally extremely well-tolerated. Mild GI distress (gas, bloating) at high doses — typical of soluble fiber adjustment. Always consult a healthcare provider before starting any new supplement, especially if you have underlying conditions or take medications.

Does ResistAid® (Larch Arabinogalactan — Lonza) interact with medications?

Known drug interactions may include: Generally minimal drug interactions. Immunosuppressants — theoretical concern with immune-activating ingredients; consult. Consult a pharmacist or healthcare provider if you take prescription medications.

Is ResistAid® (Larch Arabinogalactan — Lonza) good for immune support?

Yes, ResistAid® (Larch Arabinogalactan — Lonza) is researched for Immune Support support. Multiple ResistAid RCTs show reduced incidence of cold and flu symptoms in healthy adults. Riede 2013 (Curr Med Res Opin) showed 23% fewer cold episodes in ResistAid group vs placebo.