Kefir is a good, healthy dietary product, an excellent source of beneficial bacteria, calcium and vitamins. As for the benefits of kefir at night for weight loss, unfortunately, this is a myth.
Kefir is very rich in protein and very rich in fat. This good will take a long time to digest and will have the opposite effect on your figure.
In addition, dairy at night is not recommended for those who are prone to edema. The norm of kefir per day is no more than 2 glasses, that is, about 400 ml.
As for low-fat kefir, it is not so useful in itself.