A Reorder Trigger for a Daily Capsule: Deciding When to Reorder Before the Tub Runs Out

Running out of a daily supplement rarely happens on a quiet week. It happens when a big job lands, the van is booked solid, and nobody remembers the tub has been light for days. The fix is a reorder trigger: a point you decide in advance, so ordering becomes a routine step rather than a decision.

Count in days, not in tubs

"I'll order when it's nearly empty" is vague. Convert what you have into days of supply instead.

Look at the label for the number of servings in the tub, then work out how many are left. If you take one capsule a day, the number of capsules is the number of days. If your routine differs, divide the capsules remaining by the number you take each day.

Write the result on a sticky note or in your phone. You now have a number you can compare against a trigger.

The simple formula

Your reorder trigger is the number of days of supply left at which you place the next order. Build it from three parts:

• Delivery time: how many days the order actually takes to reach you, from clicking buy to the parcel on your doorstep.
• Slip allowance: extra days for a missed cut-off, a bank holiday, or a parcel that turns up a day late.
• Busy-week cushion: extra days because you may not be at the door, or at the computer, when you need to order.

Add them together. If delivery takes D days, the slip allowance is S and the cushion is C, your trigger is D + S + C days of supply left. When your countdown reaches that number, you order, whatever else is going on.

Pick generous numbers for S and C. A tub that arrives early costs you nothing. A gap costs you the routine.

Get the delivery figure from the right place

The D in your formula is where most people guess. A "Get It By" banner beside the buy button is tempting to use, but it is page design meant to nudge you, not the same thing as the delivery terms or your order confirmation. For a worked explanation, read what to confirm about 'get it by' dates before you rely on them.

In practice, check these once and record the answers next to your trigger number:

1. The shop's delivery or shipping information page, usually linked from the footer or FAQ. Note the stated delivery window and whether it counts working days.
2. Dispatch versus delivery. "Ships within" a period is not "arrives within" it. Add the two together.
3. The order cut-off time. An order placed after it may count as the next working day.
4. Your region setting. If the shop has a country or region selector, confirm it matches where the parcel is going before you read any dates.

Do this once per supplier, not every order. Then your trigger number stays valid until the shop changes its terms.

Make the trigger hard to miss

A rule you have to remember will fail in a busy week. Attach it to something physical or automatic:

• A calendar reminder set for the day the supply will hit your trigger. Work it out when you open a new tub: today's date plus servings in the tub, minus the trigger days.
• A marker on the tub. When you open it, put a mark or a sticker on the date you should reorder.
• A shared note for the crew, if several people take the same product, saying who orders and from where.

If you keep a spare at the yard or in the van, count it in your days of supply only if you will really use it from there.

Adjust for the weeks that go wrong

Some weeks deserve a bigger cushion. Raise your trigger before:

• a long job away from base, where parcels can't reach you;
• a holiday period, when carriers and dispatch can be slower;
• a stretch when nobody will be at the delivery address.

Then drop it back to normal afterwards. Writing the busy-week trigger next to the normal one saves you recalculating under pressure.

If you miss the trigger anyway

Don't take more than the label says to stretch what's left, and don't double up later to catch up. If a gap would matter, or you are unsure about changing how you take something, ask a pharmacist or your GP. If you take it for a pet, ask your vet.

Otherwise, order straight away, note why the trigger slipped, and raise your slip allowance by a day or two. After a couple of tubs your numbers will reflect how deliveries actually reach you, and the empty-tub scramble becomes a thing of the past.