Portions matter:
Though the right dark chocolate clearly has concrete beauty benefits, you have to keep portion control in mind. If you eat a 12-ounce bar, you’re getting a lot more than just flavonoids—you’re also getting fat, sugar and lots of calories.
“The research indicates that two to three ounces of 70-plus percent dark chocolate a week is all you need to reap the health benefits,” says Kirkpatrick. “To satisfy your daily cravings without blowing your diet, a one-ounce square in the afternoon or as a mini-dessert at after dinner is fine.”