yogurt with postbiotics and berries on dark background. concept for healthy intestine and immune system. close-up

postbiotics yogurt diet fermented food homemade natural organic healthy white appetizer bacteria canned cooking dairy digestion dinner fermentation improvement ingredients intestines microflora nutrition preservation sour sourdough variety ayran beverage buttermilk drink fresh glasses kefir milk postbiotic probiotic refreshing refreshment summer table traditional turkish wooden berries raspberries blueberries