Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Blueberry (unspecified species, but often Vaccinium corymbosum or Vaccinium angustifolium) is used to support the body against free radical damage primarily due to its high content of antioxidant compounds, such as anthocyanins, flavonoids, and vitamin C. Scientific studies, both in vitro and in vivo, have demonstrated that blueberries possess significant antioxidant capacity. For example, laboratory assays like ORAC (Oxygen Radical Absorbance Capacity) have shown that blueberries are among the fruits with the highest antioxidant activities. Animal studies suggest that blueberry supplementation can reduce oxidative stress markers and protect against oxidative damage in various tissues. Human clinical trials are more limited but indicate that regular blueberry consumption can increase plasma antioxidant capacity and reduce oxidative DNA damage. However, while the antioxidant properties are well-established biochemically, evidence linking blueberry consumption directly to prevention or treatment of specific diseases mediated by free radical damage (such as neurodegeneration or cardiovascular disease) is still emerging and not definitive. Thus, the scientific evidence is moderate, supporting the use of blueberries as a dietary source of antioxidants with potential to help combat free radical damage, but more research is needed to confirm clinical benefits in humans.

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