https://www.theatlantic.com/health/archive/2017/08/b12-energy/537654/?single_page=trueVitamin B6 and B12 Supplements Appear to Cause Cancer in Men
"Concerns about B-vitamin supplements and cancer have been percolating for years. They came up quietly in a large trial in Norway that concluded ten years ago. Starting in 1998, researchers assigned 6,837 people with heart disease to take either B vitamins or a placebo.
The researchers then watched as people died and contracted diseases in ensuing years—and the vitamin group raised concerns. In 2009, the researchers reported in the Journal of the American Medical Association that taking high doses of vitamin B12 along with folic acid (technically vitamin B9) was associated with greater risk of cancer and all-cause mortality."
58 yo male at diagnosis: T1bN0M0, 0/15 nodes, low grade/moderately differentiated adenocarcinoma
03/2016 colonoscopy #1: 2 small polyps removed in left colon; CEA = 1.3
04/2016 colonoscopy #2: caecum sessile 3.5 cm polyp piecemeal removed with kind of clear margins
05/2016 "prophylactic" laparoscopic right hemicolectomy - bleeding, leak, infection
06/2017 CT scan, colonoscopy OK; CEA = 1.6
A lot of funny stuff discovered by CT scans in liver, kidney, lungs, arteries, gallbladder and a lymph node