Answer: Blueberries are too high in fructose to fit the keto diet.
Blueberries have several health benefits, as they are high in antioxidants and vitamin C. Unfortunately, they are one of the most carb-heavy berries. A sinle cup serving of blueberries contains 18 g of net carbs.
Blueberries are okay in small amounts, but when possible, eat lower-carb berries such as blackberries or raspberries.