Try a lower-calorie version. Use lower-calorie ingredients or prepare food differently. For example, if your macaroni and cheese recipe uses whole milk, butter, and full-fat cheese, try remaking it with non-fat milk, less butter, light cream cheese, fresh spinach and tomatoes. Just remember to not increase your portion size. For more ideas on how to cut back on calories, see Eat More Weigh Less.
Pesticides are toxins, "and I think there's good cause for worry about them," says Purdy. A new study in Food and Chemical Toxicology links pesticide-laced feed to tumors and early death in rats. Organic is ideal, but if that's not possible, pick produce with thick skins that peel off, because they're less likely to be contaminated. (Here's how to save money on organics.)
Some still consider fasting -- in any form -- to be "out there." "When I review diets that are not based on science, the question I ask myself is: Would I feed them to my family? In this case, the answer is a clear no," says Susan Roberts, PhD, chief of the Energy Metabolism Laboratory at the Jean Mayer USDA Human Nutrition Research Center on Aging and a professor of nutrition at Tufts University in Boston.