Hand pouring and mixing together yogurt and ketchup to make sauce in a black bowel

ayran sour milk buttermilk milk yogurt yoghurt classic yogurt dairy liquid lactobacilli cream yougurt healthy gut flora white low fat beverage making sauce drink food microbial acidic digestion digestive pouring flowing bowel health gut health diet fermented products bacteria gut fungus eating kephir refreshment preparation healthy fermentation cold tibetan healthy eating microbiology gastrointestinal tract glass intestine container freshness mushrooms red sauce