This in turn can lead to over-production of fat which can be harmful for your
health. Foods with the highest fructose content are peaches, prunes, pears, cherries, plums, apples and apple cider, grapes and dates. These fruits are hardest to digest and can cause fructose intolerance. Excessive fructose can lead to leptin resistance, which could cause weight gain if combined with a high fat and calorie diet. High levels of fructose can also raise blood pressure. Do write to us again.