Bilberry extract is a standardized powder derived from the fruit of plants in the *Vaccinium* genus (family Ericaceae), with anthocyanins serving as its key active ingredients. It is best known for its application in eye health, frequently serving as an ingredient in dietary supplements designed to alleviate eye fatigue.
● Key Ingredients and Sources
Primary sources: Typically extracted from varieties such as the lingonberry.
Key Ingredient: Anthocyanin content is the primary indicator for assessing the quality of the extract. Common specifications for commercially available products include anthocyanin levels of 25% and 36%, and the product typically appears as a fine, dark purple powder.
●Key Benefits
Its efficacy claims focus primarily on antioxidant properties and the improvement of microcirculation:
Alleviating eye fatigue: This is its most well-established commercial application. Numerous health supplements formulated with bilberry extract have been approved with the specific health claim of “alleviating eye fatigue,” and are suitable for individuals prone to eye strain.
Antioxidant and Vascular Protection: Anthocyanins are potent antioxidants that help scavenge free radicals. Research suggests they enhance capillary flexibility—earning them the descriptive nickname “capillary repairmen”—which forms the theoretical basis for their role in supporting eye health.
Supporting blood glucose management: Some preliminary clinical studies indicate that supplementation with standardized bilberry extract may help reduce postprandial blood glucose and insulin responses in volunteers with type 2 diabetes; however, the evidence is insufficient to replace standard medical treatment.
●Safety and Purchasing Tips
Safety：Bilberry fruit is considered safe at the dosages typically used in foods and supplements. However, bilberry leaf may be unsafe when used in high doses or over the long term.
Check the standards: When purchasing, pay attention to the percentage of anthocyanin content on the label (e.g., 25%), as this is a key indicator of the extract’s concentration.
Note on contraindications: When used as an ingredient in health supplements, some products explicitly list children, pregnant women, and nursing mothers as groups for whom the product is unsuitable.
In summary, bilberry extract is a standardized ingredient centered on anthocyanins; it is primarily used in health supplements designed to alleviate eye fatigue, with its antioxidant properties serving as the theoretical basis for these applications.Given the many benefits of bilberry extract, it is certainly worth giving it a try!
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Post time: Sep-21-2026