Ahhh... a popular topic in my household; lots of digestive issues here.
Collectively these chemicals (the ones that cause digestive issues like the author's) are known as FODMAPs, and cause issues for a lot of people. Monash University is the authority here, having identified them in the first place and produced a ton of dietary information about them: https://www.monashfodmap.com/about-fodmap-and-ibs/
The author says she doesn't have any trouble with lactose, fructose, and gluten, but cutting out sugar alcohols (polyols, the "P" in FODMAP) helped a ton. This is pretty common; people with FODMAP intolerance can typically digest some but not all of them.
The process is basically (1) go on a very restrictive elimination diet that cuts out all FODMAPs, then (2) gradually test each one at different quantities to find out if you can handle it and at what quantity.
Collectively these chemicals (the ones that cause digestive issues like the author's) are known as FODMAPs, and cause issues for a lot of people. Monash University is the authority here, having identified them in the first place and produced a ton of dietary information about them: https://www.monashfodmap.com/about-fodmap-and-ibs/
The author says she doesn't have any trouble with lactose, fructose, and gluten, but cutting out sugar alcohols (polyols, the "P" in FODMAP) helped a ton. This is pretty common; people with FODMAP intolerance can typically digest some but not all of them.
The process is basically (1) go on a very restrictive elimination diet that cuts out all FODMAPs, then (2) gradually test each one at different quantities to find out if you can handle it and at what quantity.