The most effective thing for me seemed to be hitting the gym hard, lifting heavy and sweating a lot.
Alongside that, I went through a lot of trial and error with the foods my body would tolerate. I started with a low histamine/low FODMAP approach, various fasting methods, bone broths (collagen), probiotics (sauerkraut, kefir), etc., and slowly introduced various foods on top of that while noting what made me feel good or bad and basing my diet around that. Everyone is different so what worked for me diet-wise may not work for you.
Lastly, for my particular case, I think liver-boosting supplements like milk thistle and NAC helped significantly (and probably some others for any vitamin/mineral deficiencies, especially D3+K2). I suspect the root cause of my problems was toxic mold plus stress/trauma.
It's just uncanny to see a whole lot of the "random" foods that make me feel bad on a single list, and that number next to the anchovies explains the post-homemade pizza feeling too...
Will definitely need to follow up!
Statistically speaking this is probably not it and you considered/tried it already, but just wanted to bring it up in the off chance that you hadn't heard of this before. I mean doctors just said "irritable bowel syndrome! theres no cure sorry bye". She's been writing a low-histamine foodblog for some years, which includes a good starting point for what to eat and avoid: https://histaminefriendlykitchen.com/histamine-friendly-food...