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Dietary supplement

FiberAid Ingredients & Drug Interactions

by Swanson

FiberAid label
See full label image
Powder Category: Fiber And Other Nutrients
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking FiberAid 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

FiberAid is a dietary supplement by Swanson 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 FiberAid. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against FiberAid by Swanson

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

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HelloPharmacist Scorecard of FiberAid by Swanson

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 30, 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.

FiberAid is a single-ingredient powder: larch arabinogalactan, a type of soluble fiber derived from larch tree wood. It's intended to support digestive health and overall wellness through fiber intake.

The product contains no inactive ingredients.

Does it work?

Couldn't assess
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 assessable

We hold no graded evidence for this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: promotes healthy microflora and assists constipation.
  • We looked for evidence on: Dysbiosis, Irritable bowel syndrome, Digestive health.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

The evidence for larch arabinogalactan is not established in the data we hold. We have insufficient reliable evidence to rate whether it works for common cold or high cholesterol (hyperlipidemia).

If you're considering it for one of these purposes, talk with your doctor about what the current research actually supports.

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 when taken by mouth, but high-quality long-term safety data are limited. Some people experience bloating and flatulence.

The safety data available are not robust enough to use this product without your doctor's approval — there isn't enough information to know how safe it is across different people and situations, so provider guidance is advised before you start.

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.

Do not take FiberAid if you're on an immunosuppressant medication — such as cyclosporine, tacrolimus, mycophenolate, basiliximab, daclizumab, muromonab-CD3, or azathioprine — without talking to your doctor or pharmacist first. Larch arabinogalactan may interfere with how these drugs suppress your immune system.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

FiberAid may be worth considering if your doctor clears it and you're looking for a soluble fiber supplement — but it's not for anyone on immunosuppressant medications without checking first. If you take any prescription drugs, especially those that manage immune function or organ transplant rejection, verify your list with your doctor or pharmacist before adding this.

Start the conversation there.

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 22, 2024.

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 FiberAid, straight from the product label.

Brand Swanson
Barcode (UPC) 087614025087
Net contents 8.8 Ounce(s); 250 Gram(s)
Market status On market
Date entered into DSLD Feb 22, 2024
DSLD ID 308531
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)
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 FiberAid by Swanson, 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:
1.5 Gram(s)
Maximum serving Sizes:
1.5 Gram(s)
Servings per container
166
UPC/BARCODE
087614025087
IngredientAmount% DV
Calories5 Calorie(s)--
Total Carbohydrate1 Gram(s)1%
FiberAid1.5 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.
Formula

Features FiberAid a larch arabinogalactan-based soluble prebiotic fiber

Larch tree arabinogalactan (AG) Prebiotic fiber

Formulation

Promotes healthy microflora in the digestive system Assists with occasional constipation

Digestive health

Brand IP Statement(s)

Swanson Science-backed quality since 1969

FiberAid FiberAid is a registered trademark of Lonza Inc.

Suggested/Recommended/Usage/Directions

Suggested use: As a dietary supplement, mix one scoop (1.5g) in your favorite food or beverage three times per day. Scoop included.

Precautions

Warning: For adults only. Keep out of reach of children.

Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Do not use if seal is broken.

Storage

Store in a cool, dry place.

FDA Disclaimer Statement

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

FDA Statement of Identity

Dietary Supplement

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

See for yourself

FiberAid by Swanson label

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

FiberAid 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 FiberAid by Swanson

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

Serving size1.5 Gram(s) Dosage formPowder Servings per container166 Amounts shown are per serving.

FiberAid

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

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...

FiberAid monograph & interactions
Interaction report

FiberAid by Swanson Drug Interactions

Want to check YOUR meds against FiberAid?

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

FiberAid 121

Individual Drug Interactions

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

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

Each ingredient & the kinds of drugs it affects

For each ingredient in FiberAid 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.

FiberAid1 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
FiberAid full monograph & interactions
The maker

Brand information

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

Swanson

See all Swanson products
Name
Swanson Health Products
City
Fargo
State
ND
ZipCode
58104
Phone Number
1-800-437-4148
Web Address
swanson.com
Pharmacist Counseling Corner

FiberAid by Swanson: Common Questions

Does FiberAid by Swanson interact with any medications?
Yes. Based on its ingredients, FiberAid 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?
FiberAid 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.
What exactly is in FiberAid?
FiberAid contains larch arabinogalactan, a soluble fiber from larch tree wood. That's it — no fillers or other active ingredients.
Will it help with my cholesterol or prevent colds?
The evidence isn't established. We don't have reliable data showing larch arabinogalactan works for high cholesterol or common cold, so we can't say whether it will help. Your doctor can discuss whether it's worth trying based on your situation.
What side effects might I notice?
Some people experience bloating and flatulence — common effects of adding fiber to your diet. It's generally well tolerated otherwise, though long-term safety data are limited.
Is it safe during pregnancy or while breastfeeding?
We don't have enough safety data to say either way. Talk with your doctor or pharmacist about whether it's okay for you during pregnancy or lactation.
Why does the label say to avoid it unless a doctor approves?
The safety information available is incomplete — we don't have enough long-term data to be certain it's safe across all situations and all people. Your doctor's approval means they've assessed your individual health and decided it's reasonable for you.

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

Not sure if FiberAid is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

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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.

FiberAid label
Go deeper

The Full Monographs Behind FiberAid’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

FiberAid'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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