Blueberry

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What is blueberry · the blue is anthocyanins

EVIDENCEGUIDE 1

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The blue-purple color of blueberries comes from a class of pigments in the skin called anthocyanins. In a test tube they are strong antioxidants, but most of what you swallow never reaches the blood; what does get into the body is mainly small fragments that gut bacteria break them into. So the benefit is mild, and blueberries are not medicine. The chapter on whether anthocyanins actually help walks that path step by step.

Anthocyanins sit in the skin, not in the flesh. In the same bite, the smaller the berry, the larger the share of skin, and the more pigment comes with it.

Two kinds dominate the shelves. Cultivated (highbush) blueberries are large, thin-skinned, and sweeter; wild (lowbush) blueberries are smaller and more intense in flavor, and often higher in anthocyanins, again because of the share of skin.

Words like superfood and anti-aging berry are marketing, not conclusions from nutrition science. Blueberry is a fruit that is fairly low in sugar and worth eating often, but it does not cure disease, slow aging, or detox you.

Dusty-blue berries, with one cut open to show pale flesh within a thin dark skin. — A CLOSER LOOK
Blue skin, pale flesh
Anthocyanins are concentrated in the skin. The cut face explains color distribution, not the size of an effect in the body.

Educational content, not medical advice — consult a clinician.

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