How long will it take for marijuana to leave my system? One time user?

I have a life insurance drug test coming up that I have been delaying as long as possible.

I smoked weed for the first time 20 days ago. I weigh 150 pounds and have roughly 9% body fat.

The life insurance company is testing my blood and urine. Does anyone know what I should expect?

Life insurance drug tests usually check for use of any legal prescriptions you may or may not have disclosed on the application for life insurance; such as, use of cholesterol pills, heart medication, or meds for diabetes or any other common type of health conditions.

Also, the tests will check for any use of tobacco products, nicotine and continine in your system.

In addition, the tests will identify any other health issues, including HIV/AIDS or any STD's.

The drug testing will check for any illegal drugs, including but not limited to marijuana use, cocaine, and methamphetamines.

The marijuana may stay in your system for up to 30 days or more, depending on the amount of use, frequency of use, and type of test performed.

Here's how you can learn more about life insurance drug tests.