But before you dig into a bag, there are a couple of caveats. Nuts are high in calories, which is why experts suggest measuring out 1-ounce portion sizes instead of grabbing handfuls. Also, avoid nuts that are coated with salt or sugar. Sodium is bad for your blood pressure, and the sweet-and-savory combo — think chocolate-covered peanuts or honey-roasted cashews — are high in carbs. Stick to dry-roasted or raw nuts.