Patsy Catsos August 11, 2014 Sciency stuff, Testing and diagnosis Fructose Malabsorption (FM) and FODMAPs Patsy Catsos August 11, 2014 Sciency stuff, Testing and diagnosis People who experience fructose intolerance are predisposed to react poorly to large loads of other rapidly fermentable, osmotically active carbohydrates, too. Therefore, many people with FM will find the FODMAP approach helpful.