Pour kefir into the blender bowl. We wash the berries under running water, dry them with a paper towel. Separate the tails and add the strawberries to the kefir.
Add mint leaves. Add sugar. We combine all the components with a blender until the mass acquires a thick, homogeneous texture.
Pour smoothies with kefir, strawberries, and mint into glasses. Enjoy strawberry smoothies anytime.