This looks like a dieter’s dream—who doesn’t love peanut butter? The opportunity to slather this sweet, crunchy comfort food on to everything almost makes the rather bland dinners (usually consisting of skinless chicken breasts and a salad) palatable.

Why peanut butter? The diet, created by nutritionist and Prevention magazine editor Holly McCord, cites studies that foods like peanut butter with high levels of monounsaturated fats can actually prevent heart disease and promote weight loss. This isn’t license to “go nutty” and snack to oblivion. A fat is still a fat—which is why McCord designed her diet to limit peanut butter intake to 4-6 tablespoons a day, and a total calorie count of 1,500 a day. You still need to exercise, watch portions, and weight loss is gradual but steady—around half a pound a week. In other words, it’s not a quick fix, although the peanut butter certainly makes the work sweeter to swallow.