PO box shipping is fine for most supplement orders, with one condition: the parcel has to travel by USPS. Courier networks don't deliver to a box, so an express option that hands off to a private carrier will bounce. If you use a PO box, choose the postal service at checkout and the rest of the process behaves normally.
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Which addresses work with which carrier
USPS delivers to PO boxes, rural routes and every residential address in the country. Private couriers deliver to street addresses only, and they need a physical location for signature and proof of delivery. That's why a box address and an express courier is the combination that fails.
If you need speed and a box, the practical answer is a street address you trust, or a hold-for-pickup option where the carrier keeps the parcel at a local depot.
Why tracking stalls on a shipping route
Scans are batched at hubs rather than recorded continuously. A parcel moving overnight between two facilities can show no update for 24 to 48 hours while it's travelling perfectly well, and then update 3 times in an hour when it reaches the next hub.
That pattern makes a stalled page look like a lost parcel when it's usually just a gap in data. The rule of thumb is to worry after 3 business days without any movement, not after 1.
When the box is too small
A parcel that doesn't fit gets a slip and a trip to the counter. Box sizes vary by location, and a multi-bottle order can exceed a small box even though a single bottle fits comfortably. If you order in multiples, a street address saves the trip.
The slip is held for a set period, usually 15 days, after which the parcel returns to us. That window is generous but not infinite, and it's the reason a delivery notification is worth reading.
Carrier handoff is where most surprises live. A shipping service may start with one carrier and finish with another, particularly for rural routes, and the tracking number stays the same throughout. If the page shows an unfamiliar carrier name halfway through, that's a handoff rather than a mistake.
That's also why a delivery estimate can shift by a day without anyone doing anything wrong. The second carrier runs its own schedule, and the estimate belongs to the first one.
What to put in the address fields
A box number goes on the second line where an apartment number would normally sit, and the ZIP code does the rest of the work. Getting that line right is the difference between a delivery and a return. Don't put both a street address and a box number in the same order, because the carrier will pick one and it may not be the one you wanted.
For a rural route, include the route and box numbers exactly as the post office writes them. A route number guessed wrong adds a week, and the correction has to be made by a human at the counter.
If a slip does arrive, bring it and a photo ID to the counter. The parcel sits there for 15 days before it comes back to us, and a re-ship costs another dispatch cycle rather than a new order.
The short version
Box means USPS. Expect tracking gaps of 2 days. Give a parcel 3 business days before worrying, and put the box number on line two. That's the whole set of rules.
Frequently asked questions
Can you ship to a PO box?Show answerHide answer
Yes, via USPS. Courier-only services like some express options cannot deliver to PO boxes.
Why does tracking sometimes stall?Show answerHide answer
Carriers batch scans. A parcel can sit between hubs for 24 to 48 hours without an update while still moving.
What if my box is too small for the parcel?Show answerHide answer
USPS holds it and leaves a slip. Large envelopes and small boxes fit most box sizes we ship.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
