I see it mainly in my mood. I have borderline personality disorder, and before doing Wim Hof, a lot more things use to set me off into depressive or psychotic spirals. Since then, it’s honestly helped me ‘weather the storm’ so to speak. I also have adhd and the focus aspect is real.
You’ve got to keep it up. Definitely gets harder to do each morning after 5 or so days, but it really does work.