Blueberry extract concentrates the active parts of whole blueberries, typically standardized for anthocyanin content. A capsule or powder delivers a consistent, higher dose of these compounds than eating fresh berries. Take it with meals to improve absorption.
The antioxidants and polyphenols in the extract help protect cells from oxidative stress. Many people take it to support healthy blood sugar and cardiovascular function. It also draws attention for promoting alertness and memory as part of normal aging.
Watch your blood sugar closely if you use diabetes medication. The extract may slow clotting, so use care with blood thinners or before surgery. It contains oxalates, which could raise the risk of kidney stones if you are prone to them.