Yogurt is an Alkaline Food as well as being acidic.
Greek yogurt has a pH level of around 4.84 to 4.94.
Even though its pH makes it acidic, it's actually alkaline-forming.
It means that it helps your body stay alkaline and doesn't worsen the symptoms of acid reflux.
Generally, the pH of yogurt is in the range of 4-4.6, an average of 4.4.
Lactic acid present at this pH is ideal for yogurt.
Besides preventing microbial growth due to low pH, lactic acid also aids in thickening and also provides a characteristic tartness to yogurt.
Yogurt is a product of the acidic fermentation of milk.
The lactose in the milk is converted to lactic acid, which lowers the pH.
When pH drops below pH 5, micelles of caseins, a hydrophobic protein, loses its tertiary structure due to the protonation of its amino acid residues.
Yogurt is a fermented milk product.
While the pH of milk can range between 6 and 8, the fermentation process yogurt undergoes reduces the pH of yogurt to 4.3 or 4.4.
Additional ingredients like citrus fruits and the duration of fermentation can make yogurt even more acidic.