How to control cea in non smoker female of 42yrs old because now in her reports her cea is 29.1 so how bring to a normal level?

High CEA: Smokers can have high CEA but befor labelling this you need to exclude other causes for this high number like cancer of colon, ovary and lung

Hard to tell.: The CEA is one of our non-specific tumor markers. I would not attribute its elevation solely to smoking. This marker is associated at least with gastrointestinal cancers, and its elevation should be considered in that respect.