Will anything show up in blood work when applying for a non-smoker life insurance policy?
No, there shouldn't be any signs of nicotine in your blood after a year. Usually it is out of your system after 4 weeks or so, depending on the type of test, which may include saliva, blood or hair follicle.
However, you should always answer the questions on a life insurance application truthfully. If you don't, and you end up dying from a health condition you didn't let the insurance company know about when applying, your claim may or may not be denied.
For instance, if the application asks if you have smoked in the last 5 years, and you say no, but you have, then you end up dying of lung cancer the following year, they may be able to deny the claim on your life insurance policy.
I believe there's a 2 year period of time the insurance company can contest your life insurance coverage from the time you purchase the policy.
In addition, there are life insurance no medical exam plans available that may offer up to $300,000 of term life insurance without any health exam, blood or urine tests required.