I suggest your father begin taking 80% concentrated Curcumin power (preferably with piperene added for maximum absorption) mixed with coconut milk daily. I take a tablespoon or more daily. I am not a doctor but you can google for some medical studies on its efficacy for gut related cancers and disorders. I am not giving medical advice, just sharing my personal knowledge and experience.

Can you share with us how you discovered Steemit and what motivated you to try it? Have you historically been a crypto-currency and blockchain enthusiast?

P.S. I grew up in New Orleans. A white boy who was impromptu dancing in the Zulu parades in the early 1970s before that became mainstream and commercialized as it is now. Since you are my age, I suppose you understand that I was called "white boy" 40 years ago.