This formula's own materials state it's produced in an FDA-registered facility — worth understanding exactly what that does and doesn't mean.
Facility registration means the manufacturing site is listed with the FDA and subject to certain manufacturing standards — a separate process from FDA approval, which applies to specific drug products, not dietary supplements generally.
This formula's own materials explicitly state that facility registration is "a manufacturing designation, not FDA approval of the product itself" — worth reading that same level of directness into any similar claim you encounter on other supplement sites.
The 6-bottle package carries the lowest per-bottle cost.
See Current Pricing