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Dietary supplement

Oat Straw Extract (Avena Sativa) Ingredients & Drug Interactions

by BulkSupplements.com

Oat Straw Extract (Avena Sativa) label
See full label image
Powder Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Oat Straw Extract (Avena Sativa) 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

Oat Straw Extract (Avena Sativa) is a dietary supplement by BulkSupplements.com with 1 active ingredient. Its ingredients are commonly taken for lowering cholesterol, heart and digestive health, soothing itchy or irritated skin.Based on those ingredients, 86 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Oat Straw extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Oat Straw Extract (Avena Sativa) by BulkSupplements.com

Ask about any prescription or over-the-counter medication and we check it for interactions with Oat Straw Extract (Avena Sativa) by BulkSupplements.com — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Oat Straw Extract (Avena Sativa) by BulkSupplements.com

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 11, 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.

This product contains one active ingredient: oat straw extract (Avena sativa). Oats are a whole grain that may help with cholesterol and heart health.

The powder also includes maltodextrin as an inactive ingredient to help with texture and flow. Oat straw extract is simply a concentrated form of the oat plant — the same grain you'd eat as breakfast cereal, but in extract form.

Does it work?

Strong evidence
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

This product doesn't appear to be marketed for a specific use, so we graded Oats's overall clinical evidence instead.

Strong

Strong clinical evidence supports Oats for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Coronary heart disease (CHD) — rated "Likely Effective" (Natural Medicines).
  • On file: Dyslipidemia — rated "Likely Effective" (Natural Medicines).
  • On file: Diabetes — rated "Possibly Effective" (Natural Medicines).
  • On file: Gastric cancer — rated "Possibly Effective" (Natural Medicines).

The evidence supports oat straw for two main uses. It's likely effective for high cholesterol (dyslipidemia) and for supporting heart health in people with coronary heart disease.

These findings come from studies on oats as a food and concentrated forms. Keep in mind that most of the research is on eating whole oats or oat bran, so how well this extract performs may differ slightly.

The evidence, ingredient by ingredient Oats

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.

Oat straw extract is generally well tolerated when taken by mouth. The most common side effects are mild and relate to the fiber content — bloating, gas, belly distention, and an unpleasant taste.

These usually fade as your body adjusts, and starting with a lower dose and gradually increasing it can help. Oats eaten as food are considered safe in pregnancy and while breastfeeding, though concentrated supplement forms haven't been studied as much.

If you're pregnant or nursing and thinking about taking this, talk with your doctor or pharmacist — there isn't enough data on the extract specifically to be certain either way.

Side effects, ingredient by ingredient Oats

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 — Oats.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 86 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.

Before taking this product, check your exact insulin and antidiabetes medications with the search tool on this page. Both carry a Moderate risk of interaction — oats can add to their blood-sugar-lowering effect and raise the chance of low blood sugar.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

Oat straw extract is a reasonable choice if you're looking to support cholesterol and heart health and don't take insulin or blood sugar medications. If you do take those drugs, check your exact medications before starting — this product could lower your blood sugar further than intended.

A conversation with your pharmacist is a smart move if you're on any diabetes medication.

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 May 21, 2025.

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 Oat Straw Extract (Avena Sativa), straight from the product label.

Brand BulkSupplements.com
Barcode (UPC) X0019YOO6N
Net contents 250 Gram(s); 8.8 Ounce(s)
Market status On market
Date entered into DSLD May 21, 2025
DSLD ID 330143
Product type Botanical
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy 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 Oat Straw Extract (Avena Sativa) by BulkSupplements.com, 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:
500 mg
Maximum serving Sizes:
500 mg
Servings per container
500
UPC/BARCODE
X0019YOO6N
IngredientAmount% DV
Oat Straw extract500 mg--

Other ingredients: Maltodextrin

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.
Brand IP Statement(s)

BulkSupplements.com Clean & pure bulk supplements

Formula

Oat Straw Extract Powder 500 mg per serving

Formulation

Color may vary

Free of: Added sugar, soy, dairy, yeast, gluten

FDA Disclaimer Statement

Warning: This product is not intended to diagnose, treat, cure, or prevent any disease.

Precautions

Always consult a physician before taking any dietary supplement.

Keep out of reach of children.

Suggested/Recommended/Usage/Directions

Suggested Use: As a dietary supplement, take 500 mg (about 1/5 tsp) once or twice daily, or as directed by a physician.

General Statements

Use an accurate milligram scale. New

Storage

Contents are sold by weight, not volume. Settling may occur. Store in a dry, cool place.

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

See for yourself

Oat Straw Extract (Avena Sativa) by BulkSupplements.com label

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

Oat Straw Extract (Avena Sativa) 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 Oat Straw Extract (Avena Sativa) by BulkSupplements.com

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

Serving size500 mg Dosage formPowder Servings per container500 Amounts shown are per serving.

Oat Straw extract

Interacts with
86 drugs
500 mg per serving

Oats are a well-studied whole grain whose soluble fiber (beta-glucan) can help lower cholesterol and support heart health when eaten regularly. As a f...

Oat Straw extract monograph & interactions

Other (inactive) ingredients: Maltodextrin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Oat Straw Extract (Avena Sativa) by BulkSupplements.com Drug Interactions

Want to check YOUR meds against Oat Straw Extract (Avena Sativa)?

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
86Drugs
86 Moderate

Ingredients driving the most interactions

Oat Straw extract 86

Individual Drug Interactions

The ingredients in Oat Straw Extract (Avena Sativa) interact with 86 drugs. Click any drug to see the details.

1 of the 1 ingredient in Oat Straw Extract (Avena Sativa) interact with drugs. Each result below shows which ingredient is responsible. Oat Straw extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Oat Straw Extract (Avena Sativa) 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.

Oat Straw extract2 drug types · 86 drugs

Antidiabetes Drugs

Theoretically, oats may have additive effects with antidiabetic agents and might increase the risk of hypoglycemia.
Consuming oats can decrease blood glucose in patients with diabetes. In those who require insulin, taking oats 100 grams daily for 2 days reduces the insulin dose required to achieve metabolic control.

Likelihood Possible Evidence D
Insulin

Concomitant use of oats and insulin might increase the risk of hypoglycemia.
In patients with insulin-dependent type 2 diabetes, taking oats 100 grams daily for 2 days reduces the insulin dose required to achieve metabolic control.

Likelihood Possible Evidence B
Oat Straw extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Oat Straw Extract (Avena Sativa), from the product label.

BulkSupplements.com

See all BulkSupplements.com products
Name
BulkSupplements.com
Street Address
7511 Eastgate Rd
City
Henderson
State
NV
ZipCode
89011
Web Address
BulkSupplements.com
Pharmacist Counseling Corner

Oat Straw Extract (Avena Sativa) by BulkSupplements.com: Common Questions

Does Oat Straw Extract (Avena Sativa) by BulkSupplements.com interact with any medications?
Yes. Based on its ingredients, Oat Straw Extract (Avena Sativa) has a known interaction with 86 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Oat Straw Extract (Avena Sativa) 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 my cholesterol?
The evidence shows oat straw is likely effective for high cholesterol and supporting heart health. That said, most of the research is on whole oats and oat bran eaten as food, so results with this concentrated extract may vary.
Can I take this if I'm on insulin?
Not without checking first. Oats can lower blood sugar and reduce the insulin dose your body needs, so you could end up with dangerously low blood sugar. Talk to your pharmacist or doctor before starting — they may need to adjust your insulin dose.
What side effects should I expect?
Most people tolerate it well. The main side effects come from the fiber — bloating, gas, and belly bloating. These are usually mild and fade over time. Starting with a smaller dose and gradually increasing it helps minimize them.
Is it safe to take while pregnant or breastfeeding?
Oats eaten as food are considered safe during pregnancy and breastfeeding, but this concentrated supplement form hasn't been studied much. There isn't enough data to be certain either way, so talk with your doctor or pharmacist for personalized advice.
What exactly is oat straw extract?
It's a concentrated form of the oat plant — the same grain you eat as oatmeal, just processed into an extract. One serving of this powder gives you a more concentrated dose than you'd get from a bowl of oats.

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

Not sure if Oat Straw Extract (Avena Sativa) is safe with your meds?

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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.

Oat Straw Extract (Avena Sativa) label
Go deeper

The Full Monographs Behind Oat Straw Extract (Avena Sativa)’s Ingredients

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

Herb & supplement monograph

Oats

Interacts with 86 drugs

Oats are a well-studied whole grain whose soluble fiber (beta-glucan) can help lower cholesterol and support heart health when eaten regularly. As a food, oats are safe for most people, and...

Read the full Oats monograph →
Sources

Sources & How We Checked

Oat Straw Extract (Avena Sativa)'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 13 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.

Oats 13 references
  1. Cooper SG, Tracey EJ. Small-bowel obstruction caused by oat-bran bezoar. N Engl J Med 1989;320:1148-9. DOI
  2. Pick ME, Hawrysh ZJ, Gee MI, et al. Oat bran concentrate bread products improve long-term control of diabetes: a pilot study. J Am Diet Assoc 1996;96:1254-61. PubMed
  3. Braaten JT, Scott FW, Wood PJ, et al. High beta-glucan oat bran and oat gum reduce postprandial blood glucose and insulin in subjects with and without type 2 diabetes. Diabet Med 1994;11:312-8.
  4. Rosario PG, Gerst PH, Prakash K, Albu E. Dentureless distention: oat bran bezoars cause obstruction. J Am Geriatr Soc 1990;38:608. PubMed
  5. Food and Drug Administration. Food labeling: health claims: oats and coronary heart disease. Fed Regist 1996;61:296-313.
  6. Foulke J. FDA Allows Whole Oat Foods To Make Health Claim on Reducing the Risk of Heart Disease. FDA Talk Paper. 1997. Available at: http://www.fda.gov/bbs/topics/ANSWERS/ANS00782.html.
  7. Chandalia M, Garg A, Lutjohann D, et al. Beneficial effects of high dietary fiber intake in patients with type 2 diabetes mellitus. N Engl J Med 2000;342:1392-8. PubMed
  8. Lembo A, Camilleri M. Chronic constipation. N Engl J Med 2003;349:1360-8. . PubMed
  9. De Paz Arranz S, Perez Montero A, Remon LZ, Molero MI. Allergic contact urticaria to oatmeal. Allergy 2002;57:1215. . PubMed
  10. Delgado G, Kleber ME, Krämer BK, et al. Dietary intervention with oatmeal in patients with uncontrolled type 2 diabetes mellitus - A crossover study. Exp Clin Endocrinol Diabetes. 2019;127(9):623-629. PubMed
  11. Sobhan M, Hojati M, Vafaie SY, Ahmadimoghaddam D, Mohammadi Y, Mehrpooya M. The efficacy of colloidal oatmeal cream 1% as add-on therapy in the management of chronic irritant hand eczema: A double-blind study. Clin Cosmet Investig Dermatol. 2020;13:241-25
  12. Hou Q, Li Y, Li L, Cheng G, Sun X, Li S, Tian H. The metabolic effects of oats intake in patients with type 2 diabetes: A systematic review and meta-analysis. Nutrients. 2015;7(12):10369-87. PubMed
  13. González-Afonso M, Cañas JA, Sastre B, et al. A Case of Anaphylaxis After Ingestion of Oats: Research Into New Allergens. J Investig Allergol Clin Immunol 2022;32(6):506-508. PubMed

See these in context on the Oats 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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