Gretchen L.
Prospective members—especially women…
Prospective members, especially women with irregular menstrual cycles or perimenopause, should understand how this program actually works. Function markets its membership around tracking changes over time through Annual and Mid-Year testing. However, if your Annual Testing is delayed because you’re following Function’s required hormone-testing timing, your membership clock does not pause or adjust. I disclosed during intake that I have irregular cycles and am perimenopausal. Function knew this before I ever scheduled my labs. I had to reschedule multiple times because my blood draw had to occur on specific days of my cycle, and I live in a rural area with limited approved lab locations. At no point was I warned that these medically appropriate delays could significantly reduce my opportunity to complete the included Mid-Year testing. I completed my Annual Testing, followed Function’s recommendations, made meaningful lifestyle changes, and then learned I could not complete the follow-up testing unless I purchased another annual membership. Function has acknowledged to me in writing that this represents a communication gap for members with irregular cycles, yet still declined to provide the included follow-up testing. When a company sells a program whose primary value is measuring change over time, withholding the second data point fundamentally undermines the purpose of the program. I hope Function changes how this is communicated so other members can make informed decisions before enrolling.
Response from Function HealthJul 23, 2026
Thank you for your feedback. We’re sorry to hear about your experience and have reached out privately to learn more. Please reply to our message when you can—we’d like to help make this right.




