I do not know how to remedy gas.
What I do know is that I do not get gassy at all. No matter what I eat, no matter how much I eat. I do not fart often, and when I do fart, it rarely stinks up the joint.
My daughter is the same way. She eats A LOT of vegan food all day long. Her farts just do not stink, the rare time she does fart.
However, my son is different. Holy moly. No matter what he eats, he farts. And his farts stink to high heaven. The two kids will have the same foods, and one will fart up the place, and the other wont do a thing.
Heck, the same thing happens with teeth too. I have never had a cavity in my life (I am 32), and there was a time when I was 10 or 11 when I ate candy every day and would go weeks without brushing my teeth. My brother, who did the same thing I did, however, has a mouth full of mercury.
Some of it is just plain genetics, and nothing will fix that other than trial and error. A food log would really help. Something where she can write down her emotions too. I do imagine that pro-biotics might help. But I have no magic pill. I do not fart much, and of all things, my son enjoys his farting. Yesterday, he went to the neighbors and played fart attack with the kids until one of the kids sharted and had to change pants. My son loved it.
"The worker has the right to leave his boss, but can she do it? And if she does quit him, is it in order to lead a free life; where she will have no master but herself? No, she leaves to sell herself to another employer. She's driven by the same hunger. Thus the worker's liberty is only a theoretical freedom, lacking any means of realization; an utter falsehood."