Very late response, but I just saw this.
My little one is a carrier. He fathers entire family have Lung issues, asthma, GI issues, Colon Issues and Liver Issues.
She began having major issues with fatigue etc at age 4, GI issues as well, and intolerance to heat and cold.
I removed all gluten, all GMO (sorry but the pesticides were messing with her), Dyes, and processed sugars or foods.
she was put on GI and pancreatic enzymes, minerals and foods with good proteins, resistant starches, plenty of vegetables and fruits (no purple for some reason they bothered her), probiotics, and she is a lot better, but still gets fatigue and heat/cold intolerance.
I use marshmallow root for GI mucin layer assistance, Mullein and Olive Leaf for Lungs and throat.
So far, much much better, she is almost 12 now.
She does Yoga, light aerobics, plays pretty much normal outside.
She will be on GI protective protocol for life.