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Dietary supplement

Bilberry 500 mg Unflavored Ingredients & Drug Interactions

by Nutricost

Bilberry 500 mg Unflavored label
See full label image
Powder Category: Botanical
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 Bilberry 500 mg Unflavored 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

Bilberry 500 mg Unflavored is a dietary supplement by Nutricost with 1 active ingredient. Its ingredients are commonly taken for eye and vision health, antioxidant support, diarrhea and digestive upset.Based on those ingredients, 275 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Bilberry 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 Bilberry 500 mg Unflavored by Nutricost

Ask about any prescription or over-the-counter medication and we check it for interactions with Bilberry 500 mg Unflavored by Nutricost — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Bilberry 500 mg Unflavored by Nutricost

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.
  • “Bilberry extract” is listed as a grouped ingredient — the label gives one combined amount (500 mg) without saying how much of each component you get.

This powder contains one active ingredient: bilberry 4:1 extract, a concentrated form of bilberry fruit. The extract is standardized at a 4-to-1 ratio, meaning the beneficial compounds from bilberry have been concentrated.

There are no inactive fillers or other ingredients in this product.

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

This is a single-ingredient Bilberry product and its label doesn't state a use — see Bilberry's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence for bilberry is mixed and often incomplete. For night vision — the claim bilberry's most famous for — the data suggests it's likely ineffective.

For other uses like age-related cognitive decline, macular degeneration, atherosclerosis, high cholesterol, and chronic venous insufficiency, we don't have enough reliable evidence to say whether it works or not. The science here is thin, so don't count on this for treating any of those conditions.

The evidence, ingredient by ingredient Bilberry

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.

Bilberry fruit itself (in food amounts) is generally well tolerated. However, concentrated supplement doses — like the one in this product — have limited long-term safety data, and the caution in the research is to avoid them until we know more.

The most common side effects are dark-colored or dark-green stools (which is harmless staining from the pigment), flatulence, and mild stomach discomfort. A small number of trial participants reported these, and they tend to be temporary.

During pregnancy and breastfeeding, bilberry is rated likely safe, though as with any supplement, it's worth confirming with your healthcare provider.

Side effects, ingredient by ingredient Bilberry

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 — Bilberry.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; diabetes medications.
  • For scale: 275 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 you start, double-check with your pharmacist if you take blood thinners or antiplatelet drugs (Moderate risk of increased bleeding), diabetes medications (Moderate risk of low blood sugar), erlotinib or other CYP2E1-metabolized drugs (Moderate risk of reduced drug effectiveness). The bilberry extract in this product has documented interactions with 274 individual medications across these categories.

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.

If you take blood thinners, diabetes medications, or erlotinib for cancer, talk to your pharmacist before adding this. The evidence that bilberry works for what people usually buy it for is weak or missing.

It's generally well tolerated, but long-term safety data on concentrated supplements is limited — food-form bilberry is a safer bet if you want to try it.

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 Jun 24, 2020.

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 Bilberry 500 mg Unflavored, straight from the product label.

Brand Nutricost
Barcode (UPC) 857077008930
Net contents 250 Gram(s); 0.55 Pound(s)
Market status On market
Date entered into DSLD Jun 24, 2020
DSLD ID 222846
Product type Botanical
Supplement form Powder
Dietary claims / uses 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 Bilberry 500 mg Unflavored by Nutricost, 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:
0.5 Gram(s)
Maximum serving Sizes:
0.5 Gram(s)
Servings per container
500
UPC/BARCODE
857077008930
IngredientAmount% DV
Bilberry extract500 mg--
Bilberry 4:1 extract300 mg--

Other ingredients: None

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.
Suggested/Recommended/Usage/Directions

Recommended Use: As a dietary supplement, take 1 scoop. or as directed by your physician.

Precautions

Warning: This product is only intended to be consumed by healthy individuals 18 years of age or older.

Consult your physician prior to use if you are pregnant or nursing. Consult your physician prior to use if you are taking any medications or have any medical condition.

Do not exceed recommended use. Improper use will not improve results. Discontinue use and seek professional assistance immediately if you experience unwanted side effects. Discontinue use 2 weeks prior to surgery. Do not use if safety seal is broken or missing.

Keep out of reach of Children.

Storage

Store in a cool, dry place.

General Statements

Contents are sold by weight not volume. Some settling may occur.

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.

Formula

Bilberry 500 mg per serving

FDA Statement of Identity

Dietary Supplement

Seals/Symbols

Nutricost Quality guaranteed Made in the USA

Formulation

Non GMO Gluten free product

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

See for yourself

Bilberry 500 mg Unflavored by Nutricost label

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

Bilberry 500 mg Unflavored 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 Bilberry 500 mg Unflavored by Nutricost

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

Serving size0.5 Gram(s) Dosage formPowder Servings per container500 Amounts shown are per serving.

Bilberry extract

Interacts with
275 drugs
500 mg per serving

Bilberry is a blueberry-like fruit rich in antioxidant plant compounds called anthocyanins, and it has a long history of traditional use for eye healt...

Bilberry extract monograph & interactions

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

Bilberry 500 mg Unflavored by Nutricost Drug Interactions

Want to check YOUR meds against Bilberry 500 mg Unflavored?

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
275Drugs
275 Moderate

Ingredients driving the most interactions

Bilberry extract 275

Individual Drug Interactions

The ingredients in Bilberry 500 mg Unflavored interact with 275 drugs. Click any drug to see the details.

1 of the 1 ingredient in Bilberry 500 mg Unflavored interact with drugs. Each result below shows which ingredient is responsible. Bilberry extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Bilberry 500 mg Unflavored 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.

Bilberry extract4 drug types · 275 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, bilberry fruit extract might increase the risk of bleeding when taken with anticoagulant or antiplatelet drugs.
In vitro, animal, and clinical research suggest that anthocyanidin extracts from bilberry can inhibit platelet aggregation.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, bilberry leaf or fruit extract may increase the risk of hypoglycemia when taken with antidiabetes drugs.
Animal research suggests that bilberry leaf extract might have blood glucose-lowering activity. Also, one small clinical trial in patients with type 2 diabetes shows that taking bilberry fruit extract 470 mg as a single dose prior to an oral glucose tolerance test lowers plasma glucose levels when compared with placebo.

Likelihood Possible Evidence D
Cytochrome P450 2E1 (Cyp2E1) Substrates

Theoretically, bilberry fruit extract might decrease levels of drugs metabolized by CYP2E1.
Animal research shows that exposure to small concentrations of bilberry extract in drinking water for around one month increased CYP2E1 activity by 31%. However, exposure over a 2-month period did not increase CYP2E1 activity. This effect has not been reported in humans.

Likelihood Possible Evidence D
Erlotinib (Tarceva)

Theoretically, bilberry fruit extract might reduce the efficacy of erlotinib.
In vitro research suggests that bilberry fruit extract and its constituents, delphinidin and delphinidin-3-O-glucoside, inhibit the activity of erlotinib. This interaction has not been reported in humans.

Likelihood Possible Evidence D
Bilberry extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Bilberry 500 mg Unflavored, from the product label.

Nutricost

See all Nutricost products
Name
Nutricost
Street Address
351 E 1750 N
City
Vineyard
State
UT
ZipCode
84058
Phone Number
(866) 438-3694
Web Address
www.nutricost.com
Pharmacist Counseling Corner

Bilberry 500 mg Unflavored by Nutricost: Common Questions

Does Bilberry 500 mg Unflavored by Nutricost interact with any medications?
Yes. Based on its ingredients, Bilberry 500 mg Unflavored has a known interaction with 275 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Bilberry 500 mg Unflavored 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.
Does bilberry actually help with eyesight?
The evidence says no — bilberry is likely ineffective for night vision, the main thing people take it for. For other eye issues like age-related macular degeneration, we just don't have enough reliable data to know whether it helps.
What are the side effects?
Most common are dark-colored or greenish stools (harmless staining from the pigment), gas, and stomach discomfort. These tend to be mild and temporary. In trials, only a small number of people reported them.
Is it safe to take while pregnant or breastfeeding?
Bilberry is rated likely safe during pregnancy and lactation. That said, it's always worth running it by your doctor or pharmacist for your specific situation.
Why is this powder better or worse than bilberry in food form?
Food amounts of bilberry are well tolerated, but this is a concentrated supplement extract — and concentrated supplement doses don't have good long-term safety data yet. If you want to try bilberry, food form is the safer option.
Can this help with diabetes?
The evidence is incomplete, but here's the risk: bilberry *might* lower blood sugar, which could cause it to drop too low if you're already on diabetes medication. That's why you need to check with your pharmacist first.
Will this thin my blood?
Not directly — but bilberry may slow down how your platelets clump together, which could increase bleeding if you're already taking blood thinners like warfarin or aspirin. That's a Moderate-severity interaction you need to discuss with your pharmacist before starting.

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

Not sure if Bilberry 500 mg Unflavored 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.

Bilberry 500 mg Unflavored label
Go deeper

The Full Monographs Behind Bilberry 500 mg Unflavored’s Ingredients

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

Herb & supplement monograph

Bilberry

Interacts with 275 drugs

Bilberry is a blueberry-like fruit rich in antioxidant plant compounds called anthocyanins, and it has a long history of traditional use for eye health, circulation, and mild diarrhea. While...

Read the full Bilberry monograph →
Sources

Sources & How We Checked

Bilberry 500 mg Unflavored'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 14 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.

Bilberry 14 references
  1. Cignarella A, Nastasi M, Cavalli E, Puglisi L. Novel lipid-lowering properties of Vaccinium myrtillus L. leaves, a traditional antidiabetic treatment, in several models of rat dyslipidaemia: a comparison with ciprofibrate. Thromb Res 1996;84:311-22. PubMed
  2. Morazzoni P, Magistretti MJ. Activity of Myrtocyan, an anthosyanoside complex from Vaccinium myrtillus (VMA), on platelet aggregation and adhesiveness. Fitoterapia 1990;61:13-21.
  3. Erlund, I., Koli, R., Alfthan, G., Marniemi, J., Puukka, P., Mustonen, P., Mattila, P., and Jula, A. Favorable effects of berry consumption on platelet function, blood pressure, and HDL cholesterol. Am J Clin Nutr 2008;87(2):323-331. PubMed
  4. Hawrelak, J. A. and Myers, S. P. Effects of two natural medicine formulations on irritable bowel syndrome symptoms: a pilot study. J Altern Complement Med 2010;16(10):1065-1071. PubMed
  5. Morazzoni P and Magistretti MJ. Effects of Vaccinium myrtillus anthocyanosides on prostacyclin-like activity in rat arterial issue. Fitoterapia 1986;57:11-14.
  6. Pulliero G, Montin S, Bettini V, and et al. Ex vivo study of the inhibitory effects of Vaccinium myrtillus anthocyanosides on human platelet aggregation. Fitoterapia 1989;60:69-75.
  7. Bottecchia D. Preliminary report on the inhibitory effect of vaccinium myrtillus anthocyanosides on platelet aggregation and clot retraction. Fitoterapia 1987;48:3-8.
  8. Fdez, M., Zaragoza, F., and Alvarez, P. In vitro platelet aggregation effects of anthocyanosides of vaccinium myrtilus L. Anales de la Real Academia de Farmacia 1983;49:79-90.
  9. Biedermann L, Mwinyi J, Scharl M, Frei P, Zeitz J, Kullak-Ublick GA, et al. Bilberry ingestion improves disease activity in mild to moderate ulcerative colitis-an open pilot study. 2013 May;7(4):271-9. PubMed
  10. Hoggard N, Cruickshank M, Moar KM, Bestwick C, Holst J, Russell W, et al. A single supplement of a standardized bilberry (Vaccinium myrtillus L.) extract (36% wet weight anthocyanins) modifies glycaemic response in individuals with type 2 diabetes control
  11. Aichinger G, Pahlke G, Nagel LJ, Berger W, Marko D. Bilberry extract, its major phenolic compounds, and soy isoflavone genistein antagonize the cytostatic drug erlotinib in human epithelial cells. Food Funct 2016;7(8):3628-36.
  12. Prokop J, Lněničková K, Cibicek N, et al. Effect of bilberry extract (Vaccinium myrtillus L.) on drug-metabolizing enzymes in rats. Food Chem Toxicol 2019;129:382-90. PubMed
  13. Chan SW, Chu TTW, Choi SW, Benzie IFF, Tomlinson B. Impact of short-term bilberry supplementation on glycemic control, cardiovascular disease risk factors, and antioxidant status in Chinese patients with type 2 diabetes. Phytother Res 2021. Online ahead o PubMed
  14. Bøhn SK, Myhrstad MCW, Thoresen M, et al. Bilberry/red grape juice decreases plasma biomarkers of inflammation and tissue damage in aged men with subjective memory impairment -a randomized clinical trial. BMC Nutr 2021;7(1):75. PubMed

See these in context on the Bilberry 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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