The manufacture of yogurt will be discussed here more extensively than that of
cultured buttermilk to exemplify the problems met in the making of fermented
milks. This discussion will start with a description of the starters for yogurt and
their metabolic activity.
TABLE 22.2
Composition of Conventional and Cultured Buttermilk in
g/100 g
Component Conventional Buttermilka Cultured Buttermilkb
Total solids 9.5–10.6 9.0–10.6
Fat 0.3–0.7 0.1–1.0
Phospholipids 0.07–0.18 ~0.02
Protein 3.3–3.9 3.1–3.5
Lactose 3.6–4.3 3.6–4.3
Lactic acid 0.55–0.9 0.55–0.9
a Concentrations can be lower due to addition of water (