Yes well I do make my own most of the time, but that still leaves open the question of what percentage of the lactose is converted to simple sugars which from a low carb diet point of view will still 'count', and how much is turned into lactic acid in which case it doesn't count as carbohydrate any more.

In this part of the world, one of the things often added to commercial yoghurt to make it richer are "non fat milks solids" which raise the initial lactose count by an unspecified amount so that you are left with little choice than to accept the manufacturers final carbohydrate count on the label.

Cheers,

Malcolm