wouldn't this mean there are fewer overall toxins in the body, as there are less toxins in the cells even if the blood is full to the max? Which would suggest that once a Herx has cleared you should notice some improvement?
Yes, in my unverified and oversimplified model of what's going on, it would mean there a fewer toxins overall in the body. But what causes symptoms? This I don't know. Is a toxin that has been in a cell for months being mitigated by the cell somehow? Does the release of that toxin into the blood then disturb the mitigations your body has been making for that toxin, allowing the toxin to begin causing symptoms? Do some toxins end up in new cells? This would upset the homeostasis your body had built around the presence of toxins.
Also the rate of excretion through binding may be a lot lower than the total amount of toxins. So while you're doing good overall, it may require a long time of doing so before you notice any improvement - because each excretion just upsets the homeostasis even further until there are so few toxins that the effect is minimal.
It could be that less toxins in the gut mean that more can be released into the gut, lowering the blood concentration. The lower blood concentration means more can diffuse out of cells, increasing the blood concentration again. Perhaps that blood concentration can overshoot its previous level? And if you've stopped clearing the gut because of a bad reaction there's nowhere for the extra toxins in the blood to go apart from back into other cells - hence new symptoms. Then the cells have to mitigate and find a new homeostasis with these new toxins.
It's highly speculative. It assumes the body regulates the maximum amount of toxins in the blood. It also assumes diffusion is an important factor. Both of which I've no idea whether they are true.
But then surely this would worsen my Herx not help it? All very weird. Maybe it's multitasking and the extra release of toxins is mitigated by the positive effects it has on my Herx reactions.
Glutathione does a shit load of jobs. It neutralises Reactive Oxygen Species (ROS) (and I believe this to be the mechanism behind making me feel better), it's involved in phase II liver conjugation, it transports toxins and heavy metals out of cells as well as a whole host of other things. Perhaps the symptoms of your herx are caused by oxidative stress (known to be an issue with mycotoxins). Perhaps the blood is highly concentrated with toxins, so the the glutathione can't mobilise any more, but it can reduce oxidative stress. Perhaps with me, because I notice bad effects from it about a week or so after stopping binders, it's because the toxins are being stored in the cells and adding glutathione just undoes some of this and upsets the body's attempt at getting to homeostasis.
Symptoms are likely caused by a number of different things, not just oxidative stress. So this is why we notice improvement for a while with something which then poops out. Is it lots of toxins in the blood which cause symptoms A, B and C? Lots of toxins in muscle cells which cause muscle pain and fatigue? Lots of toxin in the brain which cause the brain fog and horrible symptoms associated with cognition? If my theory is somewhere close to correct, then the interplay of symptoms as we do this should be as much of a mind fuck as we observe them to be.
I finally seem to be coming towards the end of my current Herx
Ah great! I seem to be doing ok with small amounts of chlorella every 3 days. I would aim for something similar. The day after a small dose I seem to actually be somewhat improved. Maybe my blood concentration has gone down and by day 2 the toxins start coming out of cells and I feel a bit worse again. Then it's rinse and repeat. But so far I've not had it too bad and usually feel ok to take another dose by day 3. The important thing to note is that the tiny doses definitely have a significant effect. Time and patience I think are warranted. Gonna keep at this pace for a few weeks and reevaluate.
Good luck and, of course, keep us posted.