The 1-kit package carries a shipping charge that the 3- and 6-kit packages don't — worth doing the actual math before assuming it's the cheapest way to test the formula.
The 1-kit package is $69/bottle for a 30-day supply, totaling $69, plus a separate shipping charge — while the 3-kit and 6-kit packages both include free shipping.
Since this formula's own materials describe no fixed timeline and emphasize ongoing consistent use, a 30-day supply on the smallest package covers only the earliest phase — worth weighing that alongside the free-shipping value of the larger packages.