Blueberries are not just a burst of deep color and flavor: they contain anthocyanins, potent antioxidants that protect the liver from oxidative stress, help combat metabolic deviations, and maintain gut health.
One study found that eating blueberries daily was associated with reduced liver fat in people with NAFLD, as seen through imaging. The anthocyanins in blueberries could also reduce lipogenesis (fat formation) and increase lipid oxidation by liver cells. A number of human and animal studies also support their use in glucose regulation (by increasing insulin sensitivity) and, to a limited extent, the improvement of lipid profiles such as a mild decrease in LDL cholesterol.
Mechanistically, it seems that anthocyanins might be involved in the modulation of enzymes and signaling pathways associated with fat and glucose metabolism, leading to better insulin action and cholesterol homeostasis, such as lower LDL cholesterol.
Blueberries protect the liver from oxidant damage, which initiates NAFLD, by neutralizing free radicals. They also reduce systemic inflammation, which is good for metabolism and heart health.