the guy who shared the cure he found tried all the diets - fodmap, gluten, low carb etc. - but as your wife probably knows, the truth is that none of it works, it might work 70-80%for a while but it never completely cures it. stress agravates it and it is itself stressful so she should really try what im doing if its ibs-d.
if she does the cure im doing, she can eat whatever she wants - any kind of junk, like a normal person.
you take 30g of l-glutamine daily - its a cheap supplement that has no bad effects unless you go over 40g - it will rebuild the intestinal walls - its likely that the bodies of ibs-d people dont make enough of it. you can also take rifaxamin, an antibiotic, but its not 100% necessary altho it will speed up the cure
then probiotics - at least 10billion but ideally as many as possible
you do this daily and it can take up to 6 months to work, then best advice is to just keep doing it to be absolutely sure and avoid relapse. key thing to understand is that this treatment is not harmful in anyway and is not remotely risky. you can feel ill on it but thats literally the bad bacteria dying off which is a good thing and it passes fairly quickly
here is the
thread - its 8 pages but worth reading. you will find links to serious medical research backing up the claims being made on one of the pages, and also corroboration on how l-glutamine really works all over the net.
i seriously recommend that she tries this - there is no possible downside to giving it a go and if its ibs-d it will cure the condition FOREVER.
the mental clarity and lack of anxiety i feel after a few days on this is unbelievable. my movements are down to 1-2 a day instead of at least 4. brain fog is gone.
seriously check this out