Here’s a tip that will lower the glycemic index of any meal: Fifteen minutes before you begin eating, have a spoonful of Metamucil in a glass of water. It’s true, this is normally intended as a mild laxative. But it’s simply psyllium, which is fiber—nonsoluble fiber. When you swallow that spoonful, the fiber forms a slippery lump which makes its way through your digestive tract, clearing out anything in its path. When you take some before eating, the fiber gets mixed in with the food and has the effect of slowing the speed with which your stomach digests what you’ve eaten.
