This site states that most users notice a difference in daily energy and blood sugar comfort within 3-6 weeks of consistent use.
It shows up in the stats strip, the "Two Months To Decide" guarantee section, the routine steps and the habits list. The repetition makes it the site's central timeline expectation.
"Most users" and "notice a difference" describe reported experience rather than a measured result, and the site cites no study of the finished product for this window.