This site states this directly: don't judge it too early — give it real weeks, not days, before deciding whether it's working.
Rather than promising a fast, dramatic result, this site frames a multi-week evaluation window as the realistic expectation, and connects that directly to its recommendation to choose the 3- or 6-bottle package.
Many products in this category promise a specific, short timeline before results — worth reading this site's own repeated emphasis on gradual, weeks-long evaluation as a more honest baseline than a manufactured quick-fix timeline would be.