Finding a Nutrition Diet Partner: What is the best bilberry supplement?

October 5, 2025 •

5 min read

Bilberries, the European cousins of blueberries, contain up to four times more anthocyanins, the powerful antioxidants responsible for many of their health benefits. Navigating the supplement aisle to find the right product is challenging, leaving many to wonder what is the best bilberry supplement to support their diet and wellness goals. This guide explains how to identify a superior quality supplement that delivers on its promises.

Quick Summary

This article provides key criteria for selecting a high-quality bilberry supplement. It explains the importance of standardized extracts and anthocyanin content, highlights reliable certifications like third-party testing, and compares key product features to help consumers choose effectively.

Key Points

Standardization is Key: The best supplements use standardized extracts, guaranteeing a specific, potent percentage of anthocyanins, such as 36% found in Mirtoselect®.
Verify Third-Party Testing: To ensure authenticity and potency, choose products certified by independent testing organizations like ConsumerLab.com.
European vs. American: Opt for supplements derived from European bilberry (Vaccinium myrtillus), which is naturally richer in anthocyanins than American blueberry varieties.
Check for Potency: Not all products are created equal; some may contain insufficient levels of active compounds or use cheap substitutes.
Mind Drug Interactions: Bilberry supplements can interact with blood thinners and diabetes medications, so consult a doctor before use.
Distinguish Fruit from Leaf: Always ensure your supplement is made from the bilberry fruit, as the leaf can be potentially toxic in high doses.
Consider Comprehensive Eye Support: High-quality bilberry can promote eye health by improving ocular circulation and lubrication.

Why Quality Matters in Bilberry Supplements

When selecting a bilberry supplement, the primary factor determining its effectiveness is the concentration of active compounds, known as anthocyanins. Bilberries (Vaccinium myrtillus) naturally contain higher levels of these compounds than American cultivated blueberries (Vaccinium corymbosum). However, the quality of a supplement can vary dramatically depending on the manufacturing process and standardization. Some supplements may use cheap, non-standardized powders or even adulterated ingredients, which means they deliver minimal or inconsistent health benefits. A truly beneficial supplement relies on a potent, standardized extract from European bilberries, ensuring a consistent and high concentration of anthocyanins in every dose. For instance, a trademarked extract like Mirtoselect® is standardized to 36% total anthocyanins, a level supported by extensive research. This is a crucial distinction from non-standardized products, which lack the evidence of potency and often fail independent quality tests. The source of the bilberry also impacts its efficacy, with wild European bilberries containing higher anthocyanin levels than their cultivated counterparts. Without proper standardization, the amount of active ingredients can fluctuate, making it impossible to predict or replicate any potential effects. This is why prioritizing products with a guaranteed percentage of anthocyanins is essential for maximizing the therapeutic potential of the supplement.

The Importance of Third-Party Testing

Because the supplement industry is not as strictly regulated as the pharmaceutical industry, third-party testing provides an extra layer of assurance for consumers. Reputable, independent labs, like ConsumerLab.com, test products for identity, potency, and purity. For bilberry supplements, this means verifying that the product contains real bilberry extract from Vaccinium myrtillus and that it delivers the promised amount of anthocyanins. Testing also checks for potential contaminants such as heavy metals, which can be present in some plant-based supplements. In past tests, some bilberry products have failed to meet quality standards, either by containing less than the labeled amount of active compounds or by using substitute ingredients. Looking for a supplement that carries a seal of approval from an independent testing organization is one of the best ways to ensure you are purchasing a high-quality, authentic product.

What to Look for When Choosing the Best Bilberry Supplement

Standardized Extract: Look for a label that states the extract is standardized to a specific percentage of anthocyanins (or anthocyanosides), preferably 25% or higher, for consistent potency.
European Bilberry Source: Ensure the product specifies that it uses Vaccinium myrtillus, the European variety known for its superior anthocyanin content.
Reputable Brand: Choose established brands with a track record of quality, backed by positive reviews and, ideally, using clinically researched ingredients like Mirtoselect®.
Third-Party Certification: Look for seals from independent testing bodies like ConsumerLab.com, NSF International, or USP, which confirm the product's quality, purity, and potency.
Minimal Fillers: Opt for products with the fewest extra ingredients possible to minimize the risk of adverse reactions to unnecessary additives.
Appropriate Dosage: The appropriate amount of bilberry supplement can vary based on individual needs and the specific product. Always consult the product label or a healthcare professional for guidance.

Comparing Popular Bilberry Supplements

This table compares general characteristics and quality indicators of bilberry supplements based on search results. It is not an exhaustive list but provides a framework for making an informed choice.


Feature	Life Extension (Mirtoselect®)	Swanson Bilberry (Standardized)	Best Naturals Bilberry Extract	Unspecified Generic Bilberry
Source	European Bilberry (Vaccinium myrtillus)	Bilberry Fruit	Bilberry Extract	Often unspecified/unknown
Standardization	Yes, 36% anthocyanins	Yes, 25% anthocyanins	Yes, 25% anthocyanins	Varies widely, often inconsistent
Key Ingredient	MirtoSelect®	Standardized Extract	Non-GMO extract	Can be low-quality or adulterated
Third-Party Tested	Often confirmed by quality certification programs	Information less prominent in searches	Information less prominent in searches	Unlikely, as many fail tests
Form	Vegetarian Capsules	Capsules	Capsules	Various forms
Potency	High, backed by research	Medium-high, confirmed standardization	Medium-high, though less brand detail	Often low or unreliable

Potential Health Benefits of Bilberry

Bilberry's popularity stems from its potential health benefits, particularly those related to its high antioxidant content. While traditional anecdotal claims about vision have not always been scientifically replicated, more recent, rigorous studies support several positive effects:

Eye Health: Studies suggest bilberry extract can help with eye fatigue caused by computer use and may promote healthy lubrication for those with dry eyes. It supports healthy microcirculation within the eyes and helps protect the retina.
Antioxidant and Anti-inflammatory Effects: The anthocyanins in bilberry are potent antioxidants that help protect the body from oxidative stress and inflammation, which are linked to various chronic diseases. This anti-inflammatory action may benefit conditions like ulcerative colitis.
Cardiovascular Health: Research indicates that bilberry's compounds can help improve blood vessel health, potentially benefiting those with conditions like chronic venous insufficiency by strengthening blood vessel walls and improving circulation. Studies also show potential benefits for blood pressure and cholesterol levels.
Blood Sugar Regulation: Some studies suggest that bilberry extract may help lower blood sugar levels and improve insulin sensitivity in individuals with metabolic syndrome and type 2 diabetes, although more research is needed.

Safety Considerations

While bilberry fruit is generally safe when consumed as food, the concentrated nature of supplements requires attention to potential interactions. Always consult a healthcare professional to determine the appropriate usage for your specific needs, especially if you have pre-existing health conditions or are taking other medications.

It is important to be aware of potential interactions:

Blood-Thinning Medications: Bilberry might slow blood clotting. Taking it with anticoagulant or antiplatelet drugs (like warfarin, aspirin) could increase the risk of bleeding and bruising.
Diabetes Medications: Bilberry may lower blood sugar levels. Combining it with diabetes medication could cause blood sugar to drop too low, necessitating close monitoring.
Liver-Processed Medications: Bilberry can affect how the liver breaks down certain medications, potentially altering their effects.
Surgery: Stop taking bilberry at least two weeks before any scheduled surgery due to its effect on blood clotting and blood sugar.

Mild side effects, such as gastrointestinal upset, can occur but are uncommon. Crucially, bilberry leaf is potentially toxic in high doses and is not recommended for supplement use. Ensure your supplement is made from the fruit extract only.

The Verdict: What Is the Best Bilberry Supplement?

The best bilberry supplement is one that offers a standardized extract from European bilberries (Vaccinium myrtillus) with a guaranteed percentage of anthocyanins, ideally 36%, like the Mirtoselect® ingredient used by Life Extension. Look for products that have been verified by independent third-party testing organizations such as ConsumerLab.com, which is critical given the issues with product authenticity in the market. By prioritizing these quality indicators, you can confidently choose a supplement that maximizes the potential health benefits of bilberry while minimizing risks. Always consult with a healthcare provider before starting a new supplement to ensure it is appropriate for your individual health profile.

Additional Resource

For further information on supplement quality testing and reviews, visit the ConsumerLab.com website, which is a trusted source for independent test results. [https://www.consumerlab.com/reviews/bilberry-supplements-review-comparisons/bilberry/]

Frequently Asked Questions

While related, European bilberries (Vaccinium myrtillus) typically have a higher concentration of the active antioxidant compounds called anthocyanins than American blueberries. High-quality bilberry supplements are specifically formulated using extracts from these more potent European varieties.

Look for a standardized extract from European bilberry (Vaccinium myrtillus), a guaranteed percentage of anthocyanins (e.g., 25% or 36%), and evidence of third-party testing from a reputable organization like ConsumerLab.com.

While the anecdote about WWII pilots is famous, more rigorous modern studies show that bilberry does not significantly improve night vision in healthy people. It may, however, help with other eye conditions like eye strain and lubrication.

Mirtoselect® is a patented, standardized bilberry extract produced by Indena that is widely considered a high-quality, authentic source. It is standardized to 36% anthocyanins and is supported by extensive clinical research.

When taken as directed, side effects are generally mild and may include minor gastrointestinal discomfort. More serious interactions can occur with certain medications, so it is important to consult a healthcare provider.

Individuals taking blood-thinning medication (anticoagulants), diabetes medication, or certain liver-processed drugs should consult a doctor first. Pregnant or breastfeeding women should also seek medical advice before use.

No, it is generally recommended to avoid bilberry leaf extracts in high doses or for extended periods, as they can be potentially toxic. Always choose a supplement made from the bilberry fruit extract.