Like sex, coffee, and beer, peanut butter is one of the “bad” things in life that are actually good for you. Sure, it’s high in calories, but that’s because it’s packed with the same healthy monounsaturated fats as olive oil — the original death-defying potion. But olive oil tastes rotten with grape jelly, and it makes your bagel all floppy. So peanut butter‘s a better choice. It’s heart therapy you can spoon straight out of the jar.

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Not only can you reduce your risk of heart disease, but you may also increase your body’s production of testosterone. And testosterone can help you grow big muscles, have firmer erections, and quite possibly land a high-paying job in the adult-film industry 😛

But even those benefits pale in comparison with the newest discovery about monounsaturated fats, and peanut butter in particular. According to research from Brigham and Women’s Hospital, people who eat a diet high in foods like olive oil, avocados, and peanut butter are more likely to lose weight and keep it off than people following a more regimented, lower-fat diet. Nutrition researchers at Purdue University also subscribe to the skinny-in-a-Jif theory, suggesting that men feel fuller and eat less after snacking on peanut butter than after eating other foods.

The simple reason: peanut butter’s great taste. Since a diet high in an indulgence like peanut butter doesn’t leave you feeling deprived, it’s easier to follow and won’t make you prey to the cravings you feel on other diets. “Taste really is key. If you enjoy what you’re eating, it’s easier to stick with it,” says Kathy McManus, R.D., coauthor of the Brigham and Women’s Hospital study.