Hot, spicy chili peppers fall into the same category as hot mustard, Henry says. He studied them under the same circumstances as the mustard and they worked just as well. A mere three grams of chili peppers were added to a meal consisting of 766 total calories. The peppers’ metabolism-raising properties worked like a charm, leading to what Henry calls a diet-induced thermic effect. It doesn’t take much to create the effect. Most salsa recipes call for four to eight chilies – that’s not a lot.
Peppers are astonishingly rich in vitamins A and C, abundant in calcium, phosphorus, iron and magnesium, high in fiber, free of fat, low in sodium and have just 24 calories per cup.