Jelly Sandwich Heart (Blood Sugar Low?) Jam is jam. Some all-fruit jams even have more calories than regular jam. Both list whole fruit as the first ingredient. The only difference is that regular jam uses corn syrup (a vegetable-based ingredient..hence it can’t be called “all fruit.”) while in all-fruit the sweetener is concentrated white grape or pear juice, which is just highly refined sugar extracted from fruit. Either one is fine as long as you keep the serving size small and infrequent.    Photo credit: Robert Fornal via Compfight