Yogurt and Low Carb Diets
January 10, 2011 10:16 AM Subscribe
I just read a webpage indicating that due to the way the govt makes food mfgrs calulate ingredients in their products, the amount of carbs in yogurt is overstated. Much of the lactose in the milk used to make it is converted to lactic acid, but remains in the carb count in the nutrition facts on the carton. I understood the fermentation process before, but was not aware of the label being misleading. Could anyone point me to research or a definitive source showing that this is true? Thanks.
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However! That's not the end of the story. First, even in yogurt, only a fairly small amount of lactose is converted to lactic acid. This article [full version may be behind paywall] found about 0.7-0.8 g lactic acid per 100g of yogurt; This page says 0.7-1.2 g lactic acid per 1 dL yogurt. These both work out to somewhere around 2g per an 8 fl. oz. serving. Meanwhile, this page reports nutritional data of 19g carbohydrates per 8 fl. oz. plain yogurt, so you're looking at a maybe 10% difference. It may be overstated, but not by that much.
Further, it's unclear to me whether ingested lactic acid might be used as an energy source by the body anyway. Certainly, lactic acid in the blood can be used as an energy source, and it seems that ingested lactate may be used as an energy source as well, so it's possible that even though it's not technically a carbohydrate, lactic acid might to some extent function as one nutritionally.
posted by DevilsAdvocate at 2:30 PM on January 10, 2011 [3 favorites]