Apple Cider Vinegar

Apple Cider Vinegar: Just Another Vinegar Or Medical Marvel? | Modern Forager:

"...vinegar can improve insulin sensitivity in non-insulin resistant, insulin resistant, and Type II diabetic individuals when consumed before a meal. The Type II patients saw a 19% increase in post-meal insulin sensitivity and a 17% decrease in post-meal glycemia. The insulin resistant folks saw an even more marked improvement: post-meal glycemia reduction of 64% and a 35% increase in post-meal insulin sensitivity."