"Free fructose" refers to fructose that is not combined or bound with any other molecules. It is a natural sugar found in fruits, honey, and some vegetables. Full definition
If they have fruit, you may have lot of free fructose which will up the triglycerides. (nutritionfacts.org)
Fructose is a Monosaccharide (a type of simple carbohydrate) which occurs naturally as free fructose in honey and certain fruits, including apples, pears and mangoes. (fodmapfriendly.com)
Food for Health launched the very first gluten free fructose free muesli bar in 2009. (fodmapfriendly.com)