Rinse 1 cup blueberries a couple of times in water. To get rid of pesticides, soak the blueberries in water in which 1 tablespoon of vinegar is added. You can use white vinegar or apple cider vinegar. Soak for 15 to 20 minutes.
Later rinse again in water and then add the blueberries in a blender jar. Do use a good blender or mixer.
Add 1 to 2 tablespoons unrefined cane sugar. Adding sugar is optional and can be skipped. Alternatively you can add any other sweetener of your choice like jaggery, palm jaggery or coconut sugar.
Add 1 cup water. You can use water at room temperature or chilled water.
Add 1 tablespoon lemon juice.
Blend till super smooth.
Pour in glasses and serve blueberry juice immediately.