Due to an increasing incidence of colon cancer among men and women aged 45 and younger, in 2018 the American Cancer Society, and in 2021 the US Preventive Services Task Force, recommended that screening for colon cancer begin at age 45 rather than age 50. More than half of the US population reports being up to date with these screening guidelines.
Source: Barbieri R. Colorectal cancer screening, 2021: An update. OBG Manag. 2021;33:9-11, 15. doi: 10.12788/obgm.0119.