A bottle at $30 isn't expensive. A bottle at $30 that lasts 15 days is expensive. Those are the same bottle, which is the whole problem with comparing supplement prices the way most people do.
If you want to see this on a real label, the Aged Garlic Extract Gummies 90 Count - 45 Day Supply, Subscribe and Save Available product page carries the full Supplement Facts panel.
The arithmetic, done once
Take the count on the label and divide by the daily serving. A 90 count bottle at two gummies a day is 45 days of supply. Divide the price by 45 and you have your cost per day. Two numbers, and you'll never have to guess at a supplement price again.
This is also the only comparison that survives across sizes. A 120 count bottle at a higher shelf price can still work out cheaper per day than a 60 count bottle on promotion, and the shelf tag won't tell you that.
Why bigger is usually, not always, better
Manufacturing and packaging costs don't scale linearly with count, so per unit pricing usually improves as the bottle gets bigger. Usually is doing real work in that sentence. Run the division before you assume it.
The other half of the question is whether you'll finish it. Every bottle carries a best before date, and a value size that outlasts it isn't value at all.
Match the count to your trial window
Nutrient routines are worth judging over 4 to 8 weeks of consistent use. If you haven't tried a product before, buy enough to cover that window and no more. One bottle is usually about 4 weeks at the labelled serving.
Once you know you'll keep taking it, the larger size stops being a gamble. That is the point at which the saving becomes real rather than theoretical.
Where a subscription fits
A subscription removes the reordering step, which is where a lot of routines quietly die. You run out, you mean to reorder, and three weeks pass before you get round to it. The discount is the secondary benefit.
Skipping a delivery isn't the same as cancelling. Skipping moves the next shipment and keeps your terms; cancelling ends them. If you're travelling or overstocked, skip rather than cancel, then resume when you're ready.
Watch the overlap before you bundle
If you're buying two products at once, read both Supplement Facts panels and check whether they supply the same nutrient. It's a 30 second check and it's the one people skip. Two products that each supply vitamin A need their totals added together, not considered separately.
Why we print count and serving together
Every product page here states the count and the daily serving next to the price, so the division is already half done before you start. That's deliberate. A shop that shows only the bottle price is asking you to compare bottles rather than days, and bottles are the unit that flatters whichever product it happens to be pushing this week.
If a competitor's page makes you hunt for the serving size, that's information too. It usually means the arithmetic doesn't come out well once you do it.
None of this takes more than a minute once the habit is there, and it applies to every supplement you buy from here on, not just the ones on this site.
The one number worth writing down
Cost per day, in a note on your phone, next to the product name. It takes seconds to work out and it makes every future purchase decision trivial.
Discounts come and go. Cost per day is the thing you'll actually live with.
Frequently asked questions
How do I work out cost per day?Show answerHide answer
Divide the count by the daily serving for days of supply, then divide the price by that number.
Is the bigger bottle always cheaper per day?Show answerHide answer
Usually, but check. Promotions occasionally invert it.
Does a bigger bottle risk expiry?Show answerHide answer
Match the count to what you will realistically finish before the best before date.
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.
