Sour cream is produced by introducing a probiotic bacterial culture into cream. The culture produces lactic acid, which sours and thickens the cream.
Ranging from 18 to 20 percent fat, sour cream often contains additional ingredients such as gelatin, rennin and enzymes.
Light sour cream is made from half-and-half and contains about 40 percent less fat than regular sour cream; nonfat sour cream is thickened with stabilizers.
HEALING TIP: As with all dairy products, choose organic sour cream (preferably from grass-fed cows) that is rBGH-free.