It's still fringe medicine. It's still without clinical trials and concrete guidelines.
Here's a download link if you don't want to shell out. You can always buy it later if you find it helpful.
I've had yet another setback when I started holding my head upside down when taking nasal sprays/ oils etc - with the plan of getting it up into other areas of the sinuses. Well I think it worked, because as soon as I did this I lost all my hard-won gains. Breathing issues are back, can't tolerate glutathione and I feel sick again. Not the worst I've ever felt, but worse than feeling great like I had been.
I think I'm gonna try charcoal too as well - I've been completely unable to take antifungals (or anything that actively kills microbes because it seems my body just can't handle any significant increase in the toxin load), but I'm really hopeful that if I start some of these "binders" slowly they might do the trick... I did do bentonite clay for a while in the past and at times it felt like it was doing me a lot of good, but I think in retrospect I was just going to fast with it (as I do with everything) - it just started making me feel like crap again. I feel the key to a lot of this is just to go very gradually, frustrating as that is.