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Frequently asked questions
How do I join Function?
It’s quick and easy. Just click here.
How do I schedule my lab visit?
After signing up, log in to Function to easily schedule your lab visit at one of over 2,000 Quest locations nationwide at the time that works for you.
How do I reschedule my test?
In your account, select the arrow next to the upcoming visit you'd like to reschedule and choose the "Reschedule" option.
Which tests are included with a Function membership?
Members get access to 160+ lab tests annually, covering heart, hormones, thyroid, liver, and kidneys, as well as potential heavy metal exposures, nutrient levels, inflammation, potential cancer signals, and more. See all that's included here.
Can I pause or cancel?
Function is built to be a lifelong way to manage your health. While we don't allow pauses at this time, you can cancel and rejoin at any time.