Kefir

Kefir is a fermented milk product that is well known and widely used in eastern Europe. Although the scientific literature is not extensive, there appears to be evidence about the beneficial effects of consuming kefir that go beyond oral tradition. Problems that must be overcome before kefir can receive official approval as being good for health include a clear definition of what kefir is, sound scientific studies in humans to demonstrate its efficacy and identification of active ingredients.