I know you have a lot of problems to overcome. I have my own, but can honestly say that I don't struggle to do PB (with some PHD safe starches). Missing out on the LHT lately due to injury, but otherwise enjoying the food, moving slowly, sleep, play and sunshine. Only hassles at the moment are shoulder injury, for which I need to seek professional help, and too much stress at work. But in the greater scheme of things its not a problem
Four years Primal with influences from Jaminet & Shanahan and a focus on being anti-inflammatory. Using Primal to treat CVD and prevent stents from blocking free of drugs.
Eat creatures nose-to-tail (animal, fowl, fish, crustacea, molluscs), a large variety of vegetables (raw, cooked and fermented, including safe starches), dairy (cheese & yoghurt), occasional fruit, cocoa, turmeric & red wine