Well it's a good thing I don't need input to know that the flushing works for me, from experience and success. It may not have worked for you, and I'm sorry to hear. I hope other things do help. you seem to have a wealth of knowledge.
To others with food sensitivites, LGlutamine has really helped with my gut. I find I am less sensitive to gluten in general, but sugar is still highly toxic to me. It seems foolish to continue to attack candida when I know the problem is a compromised or leaky gut, but at least reducing the count can give my body a break and prevent chronic localized yeast problems. I've been taking Nystatin to help reduce the candida and reducing/cutting out sugar completely. It's definitely difficult to cut out sugar completely, but it definitely eradicates joint pain, dry skin, and most issues for me (while taking it). Don't know if anyone else notices the same connection. I know this isn't new bringing this up...but for me, everything comes back to the gut. If that's functioning well and supported, I am well. I don't have any chrohn's, ulcerative colitis, etc diagnoses. Kimchi, kefir, yogurt, and other fermented foods all the way!
Also, I do appreciate the research and hypotheses on biochemistry...but, be careful with that stuff too. Studies can easily be misinterpreted by nonscientists...keep in mind many of them are just that, studies and are correlational much of the time. Just as people can poo poo flushing and other more natural remedies, layperson interpretation can be just as dangerous even when it is based on hard science. Experience in my opinion has been the most helpful constant throughout all of this. I do think there has been some truth to what people have laid out and I do take it seriously, but cautiously.