@Sidereal
Some questions/comments :
-Are you a vegetarian? Do you take some kind of high quality protein (that normally should contain L-Cysteine)?
-How much TUDCA did you try? As discussed, try starting with a really small dose and evaluate.
Please check Molybdenum, Zinc, Ceruloplasmin, Manganese Levels whenever you can.
My feeling is that you have to go slow with whatever regimen you are trying as you have many years in this condition.
If by high quality protein you mean foods of animal origin, then no, I no longer eat those. I used to eat meat/dairy at every meal because I felt weak and hypoglycemic without it but I was making no long-term progress on this dietary approach and was in fact worsening in some areas like gastroparesis.
Since initiating a very low fat protein-restricted plant-based diet and stopping the consumption of proteins with high methionine/cysteine content, I have made significant improvements and I'm functioning better than I have in years. The initial adaptation period of a few months was
extremely rough while the ME/CFS metabolism was forced to change its substrate utilisation and abandon its over-reliance on feeding amino acids into the TCA cycle for energy production. At times I felt like I was literally going to collapse/die but I'm glad I persevered. Ironically, it was only when I dialled down my protein consumption way down to what some would consider dangerously low levels that I stopped continuously wasting muscle / lean tissue.
There is a misconception out there that eating more animal products or protein powders is somehow magically going to turn into more muscle. Instead what happens when you have this sort of illness is that you'll just burn through those aminos and get more ammonia. But I don't want to get into this because diet discussions on this forum tend to turn into emotional ordeals so let's just leave it at that.
Re: TUDCA, I started with one 200 mg dose per day. This was overstimulating and caused flu-like / die-off symptoms. Then I tried 50 mg several times per day but after a few days even that became too much. Plus, the taurine symptoms showed up. I don't think TUDCA is something I'll ever be able to tolerate since even one capsule of taurine completely messes me up. I will let you know how UDCA goes.
Thanks
@Sidereal -- kind of the same thing here with taurine -- increased cramping, twitching and urination, plus I think it made my dry eye situation worse, although it's been about a year since I last tried it, both by itself and as mag taurate.
I used to tolerate it well, in fact found benefits from it. But the way it affects electrolytes (retaining potassium and pushing out sodium?) seems to be not the thing I'm needing, perhaps because my adrenal/kidney function is 'different' than a few years ago...
@dannybex - yep, twitching, cramping, urination sounds very familiar. Taurine completely messes up my electrolytes. Some people promote taurine as a treatment for atrial fibrillation so clearly whatever cardiac ion channel issue I have is not the same as what most have since taurine
causes afib for me. Taurine affects many ion channels in cardiac and skeletal muscles including ATP-sensitive potassium channels and voltage gated calcium channels which is where I think many who are diagnosed with ME/CFS have problems so taurine can be hit or miss in this patient population.