This site states this specific figure directly alongside its rating: 30-90 days for consistent results.
Rather than a vague "give it time" instruction, this site names a specific range — worth planning your own evaluation around that stated window rather than judging within the first few days.
This site separately recommends the 6-bottle package specifically, tied to its own "give it 30 to 90 days" habit — worth reading the stat and the bundle recommendation together, since a 180-day supply comfortably covers this window.