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Dietary supplement

Arabinex Ingredients & Drug Interactions

by Thorne

Arabinex label
See full label image
Powder Category: Fiber And Other Nutrients
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Arabinex against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Arabinex is a dietary supplement by Thorne with 1 active ingredient. Its ingredients are commonly taken for immune support, cold and flu prevention, digestive and gut health.Based on those ingredients, 121 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Arabinogalactan. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Arabinex by Thorne

Ask about any prescription or over-the-counter medication and we check it for interactions with Arabinex by Thorne — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Arabinex by Thorne

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 16, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

Arabinex is a single-ingredient powder containing larch arabinogalactan, a soluble fiber derived from larch tree wood. It's designed to support digestive and immune health through its fiber content.

Does it work?

Not established
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use — see Larch Arabinogalactan's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: Immune, GI, and respiratory support.
  • We looked for evidence on: Common cold, Influenza, Upper respiratory infection, Gut health.
  • The closest evidence on file: Larch Arabinogalactan is rated "Insufficient Reliable Evidence To Rate" for Common cold (Natural Medicines).

The evidence for larch arabinogalactan isn't established in the data we hold. For both colds and high cholesterol (hyperlipidemia), the available research is insufficient to rate whether it actually works.

If you're considering it for one of these reasons, talk with your doctor about what evidence exists and whether it makes sense for your situation.

The evidence, ingredient by ingredient Larch Arabinogalactan

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Larch arabinogalactan is generally well tolerated as a fiber, though some people experience bloating and flatulence. Long-term safety data are limited.

The safety data for pregnancy and lactation aren't on file — there isn't enough information to know either way. If you're pregnant, planning pregnancy, or breastfeeding, talk with your doctor or pharmacist before taking this product.

Side effects, ingredient by ingredient Larch Arabinogalactan

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Larch Arabinogalactan.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: immunosuppressants / transplant drugs.
  • For scale: 121 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

If you take immunosuppressant medications (such as those used after transplant or for autoimmune conditions), check with your doctor or pharmacist before starting Arabinex. No other medication interactions are documented for the ingredients we could check.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

Arabinex is a fiber supplement that some people tolerate well, but the evidence for colds or cholesterol isn't clear. The main concern is if you take immunosuppressant medications — these could potentially be affected.

Check your exact medications with your doctor or pharmacist before starting, especially if you've had an organ transplant or take drugs for autoimmune disease.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Feb 21, 2023.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Arabinex, straight from the product label.

Brand Thorne
Barcode (UPC) 693749619017
Net contents 3.5 oz.; 100 Gram(s)
Market status On market
Date entered into DSLD Feb 21, 2023
DSLD ID 284186
Product type Fiber And Other Nutrients
Supplement form Powder
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Arabinex by Thorne, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
4.7 Gram(s)
Maximum serving Sizes:
4.7 Gram(s)
Servings per container
21
UPC/BARCODE
693749619017
IngredientAmount% DV
Calories10 Calorie(s)--
Total Carbohydrates4 Gram(s)1%
Arabinogalactan4.7 Gram(s)--

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formulation

Immune support GI support Respiratory support

Gluten free

This product contains no flavorings or sweeteners.

Suggested/Recommended/Usage/Directions

Suggested use: Mix 1 scoop with at least 8 ounces of water one to three times daily or as recommended by your health-care practitioner.

Precautions

Tamper evident: Use only if bottle is sealed.

If pregnant, consult your health-care practitioner before using this product.

Storage

Store tightly sealed in a cool, dry place.

Seals/Symbols

Manufactured in the USA using US & imported ingredients

Formula

Arabinogalactans

This product uses Larch Arabinogalactan (ResistAid). ResistAid is a registered trademark of Lonza.

FDA Statement of Identity

Dietary Supplement

Brand IP Statement(s)

This product uses Larch Arabinogalactan (ResistAid). ResistAid is a registered trademark of Lonza.

FDA Disclaimer Statement

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Arabinex by Thorne label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Arabinex label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Arabinex by Thorne

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size4.7 Gram(s) Dosage formPowder Servings per container21 Amounts shown are per serving.

Arabinogalactan

Interacts with
121 drugs
4.7 Gram(s) per serving Form: Larch

Larch arabinogalactan is a soluble fiber from larch trees that is mainly used as a prebiotic and for immune support. Early research is interesting but...

Arabinogalactan monograph & interactions
Interaction report

Arabinex by Thorne Drug Interactions

Want to check YOUR meds against Arabinex?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
121Drugs
121 Moderate

Ingredients driving the most interactions

Arabinogalactan 121

Individual Drug Interactions

The ingredients in Arabinex interact with 121 drugs. Click any drug to see the details.

1 of the 1 ingredient in Arabinex interact with drugs. Each result below shows which ingredient is responsible. Arabinogalactan

Each ingredient & the kinds of drugs it affects

For each ingredient in Arabinex with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Arabinogalactan1 drug type · 121 drugs

Immunosuppressants

Theoretically, larch arabinogalactan might interfere with immunosuppression therapy due to immunostimulant effects. Immunosuppressant drugs include azathioprine (Imuran), basiliximab (Simulect), cyclosporine (Neoral, Sandimmune), daclizumab (Zenapax), muromonab-CD3 (OKT3, Orthoclone OKT3), mycophenolate (CellCept), tacrolimus (FK506, Prograf), sirolimus (Rapamune), prednisone (Deltasone, Orasone), corticosteroids (glucocorticoids), and other drugs.

Likelihood Possible Evidence D
Arabinogalactan full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Arabinex, from the product label.

Thorne

See all Thorne products
Name
Thorne Research, Inc.
Phone Number
1-800-228-1966
Pharmacist Counseling Corner

Arabinex by Thorne: Common Questions

Does Arabinex by Thorne interact with any medications?
Yes. Based on its ingredients, Arabinex has a known interaction with 121 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Arabinex contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Will this help me avoid colds?
The evidence for larch arabinogalactan preventing or shortening colds isn't established in the data we hold. There isn't enough reliable research to say whether it works for that purpose.
What are the side effects?
Some people experience bloating and flatulence. Otherwise, it's generally well tolerated as a fiber. Long-term safety data are limited.
Is it safe to take during pregnancy or while breastfeeding?
There isn't enough safety data to know either way. If you're pregnant, planning pregnancy, or breastfeeding, talk with your doctor or pharmacist for personalized advice.
What does arabinogalactan do?
It's a soluble fiber from larch wood that passes through your digestive system. Some believe it supports gut and immune health, but the evidence for specific benefits isn't established.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Arabinex is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Arabinex label
Go deeper

The Full Monographs Behind Arabinex’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Larch Arabinogalactan

Interacts with 121 drugs

Larch arabinogalactan is a soluble fiber from larch trees that is mainly used as a prebiotic and for immune support. Early research is interesting but limited, and most claims are not yet fi...

Read the full Larch Arabinogalactan monograph →
Sources

Sources & How We Checked

Arabinex's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 8 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Larch Arabinogalactan 8 references
  1. D'Adamo P. Larch arabinogalactan. J Naturopath Med 1996;6:33-7.
  2. Kelly GS. Larch arabinogalactan: Clinical relevance of a novel immune-enhancing polysaccharide. Alt Med Rev 1999;4:96-103.
  3. Marett R, Slavin JL. No long-term benefits of supplementation with arabinogalactan on serum lipids and glucose. J Am Diet Assoc 2004;104:636-9.
  4. Robinson RR, Feirtag J, Slavin JL. Effects of dietary arabinogalactan on gastrointestinal and blood parameters in healthy human subjects. J Am Coll Nutr 2001;20:279-85. PubMed
  5. Udani JK, Singh BB, Barrett ML, Singh VJ. Proprietary arabinogalactan extract increases antibody response to the pneumonia vaccine: a randomized, double-blind, placebo-controlled, pilot study in healthy volunteers. Nutr J 2010;9:32. PubMed
  6. Grube B, Stier H, Riede L, Gruenwald J. Tolerability of a proprietary larch arabinogalactan extract: a randomized, double-blind, placebo-controlled clinical trial in healthy subjects. Food Nutr Sci 2012;3:1533-8. DOI
  7. Dion C, Chappuis E, Ripoll C. Does larch arabinogalactan enhance immune function? A review of mechanistic and clinical trials. Nutr Metab (Lond) 2016;13:28. PubMed
  8. Riede L, Grube B, Gruenwald J. Larch arabinogalactan effects on reducing incidence of upper respiratory tract infections. Curr Med Res Opin 2013;29(3):251-8.

See these in context on the Larch Arabinogalactan monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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