You recently reported on a study showing that cinnamon lowers blood sugar in diabetics. How much spice does it take? —N.S., via e-mail
About three-quarters of a teaspoonful a day lowered blood-sugar levels 7 percent in that study. But you might get the same effects with an even smaller dose: A previous, slightly smaller study, published in 2003, reported that consuming as little as one-quarter of a teaspoonful daily for 40 days was enough to lower blood-sugar levels 18 percent. And although both studies used cinnamon in capsule form, there’s no reason you couldn’t just sprinkle it on your morning oatmeal or banana, as long as you like the taste.