What could be heart healthier than fruit? While you might think that a fruit smoothie sounds like the perfect, healthy afternoon snack, many are bad for your heart because they pack a lot of fat and sodium. The Shredder Vanilla smoothie from Smoothie King packs a whopping 592 mg of salt into just one drink. According to the American Heart Association, most adults should consume no more than 1500 mg a day of salt. So, the Shredder Vanilla Smoothie has 1/3 of your recommended salt intake for the day. Skip the smoothie and go for a piece of fresh fruit instead.