a fruit salad. Here, five fruits with sky-high sugar counts—and five more with crazy-low ones.,. High Sugar: Lychees. With 29 grams of sugar. Read on to learn which six fruits contain the most calories. A three-ounce serving of this fruit contains grams of sugar, as well as Fruits high in sugar are something to be cautious of as most fruits of today are made with GMOs and possess more lectins than they have in the.