I'm sorry to hear this happened to your dad. This expertise is very powerful and helpful. I feel you very deeply!
As you mentioned the vitamin B intake and the incapacity of the liver of processing it, remind me of the incident of my dad which had a deficiency of vitamin K and that caused him bleeding from his nose vein for days. I guess this was related to the liver as well.
I wish you all the best in life and again great article! Namaste