I have been avoiding HFCS and sugars in general by trying to keep my daily carb consumption below 40 mg. per day. So far at 86 I have had not issues with cancer or diagnosed diabetes although some in the family have. My brother in general ate healthy food, but for many years maintained a slight beer buzz, which he said helped some peculiar heart issue he had. Three years ago he had a large cancer removed from his colon and he was diagnosed with metastatic liver cancer. He was doing well with a standard chemo, but then had his 4th Covid Vax, and immediately got much worse and continued to slide down toward death.
So my question is whether standard beer, has the kind of glucose and maltose that gets converted to fructose and HFCS type sugars, and could that have predisposed him to cancer after other severe injury weakened his immune system?
For most beer under 6% alcohol content, sugars like maltose and glucose are pretty thoroughly digested by yeast in the fermentation process, and what remains is pretty much alcohol, some carbohydrates, and proteins from the malted barley. (One exception is milk Stout has added lactose, which yeast are NOT able to digest.) That question I can answer. ( I did some home brewing back in the late 1980s, but I have not had much to drink in a number of years.
I have an opinion that alcohol might have been a contributing factor in the cancer, but a cancer question is better addressed to a doctor or oncologist.