I use Aria from Trader Joes. It's a combo of whey and soy. and says it's low glycemic. I had a hard time finding one that didn't have a ton of added sugar.
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46 years old, 5' highest weight-197lbs . Started SBD Jan 2004, again May 2009, again Feb 2010 and WW Oct 2011 hopefully this time will be the one that sticks.