3. You favor peanut butter fortified with omega-3s to get your share of those good fats.

Result: Good idea, but you’re probably not getting as much omega-3s as you may think.

Fortification of foods is sometimes good but also marketed a bit ... enthusiastically. You’d have to eat 1 cup of that peanut butter to equal the amount of omega-3s in a single serving of salmon—a whopping 1,520 calories versus about 200 calories in a 4-ounce piece of fish.

What to do: Enjoy the PB, but favor the fish.