"Furthermore we conducted meta-analysis for colorectal [relative risk (RR), 1.08; 95% confidence interval (CI), 1.00-1.17], colon (RR = 1.12; 95% CI, 1.03-1.22), breast (RR = 1.03; 95% CI, 0.97-1.09), and lung cancer (RR = 1.12; 95% CI, 0.98-1.29), for an increase of 1 mg/day of heme iron intake"

Colorectal cancer risk increases 8% per 1 mg of heme iron

Colon cancer 12%

Breast 3%

Lung 12%

This really only applies to the last 70 years of western history and the super rich of history. Most times in human history people didn't have access to a fraction of this kind of meat intake.