We earn commission on purchases made through our links. It never affects ranking: tables are ordered purely by price per dose, and no retailer or brand can pay for position.We earn commission when you buy through our links. It never affects the ranking. Full disclosure.

My stack

List the supplements you take. My stack works out when each one runs out, the day to reorder by, and what your stack costs a day at today’s prices from 34 UK retailers. Free, with no account: it stays on this device.

Add your first supplement

Search for a product you take

Loading your stack…

How it works

Add what you take. Search by name, brand or barcode, or press “Add to my stack” on any of the 5,772 product pages. One we don’t list can be typed in.
Say how many a day and how much is left. A full pack, about three-quarters, a half or a quarter, or the exact number. Log orders and what you paid whenever you like.
See the dates and the cost. When each runs out, the day to order by (allowing the retailer’s delivery time and two spare days), and what the stack costs a day, a month and a year.

What it keeps track of

When each supplement runs out
The day to reorder by
Cost a day, a week, a month and a year
Your orders and what you paid
Notes on the stack and on each supplement
Where it is cheapest to reorder today

Calculators

Kept on your device

Your stack is saved in this browser and nowhere else: no account, no cookie, nothing sent to us. Save a backup file now and then, or move it to another device with a link. Privacy.

Questions

How is the run-out date worked out?

From what you have and how many you take. An order adds its tablets, capsules or grams from the day it arrived, a count resets the stock, and each day you take it uses your daily amount; “about half” a pack of 180 counts as 90 until you correct it. The run-out date is the first day with less than a full day’s amount left. Weekdays-only, every-other-day and paused supplements are counted that way.

How is the order-by date worked out?

The run-out date, less two spare days (change them in settings), less the retailer’s standard delivery time in working days. Where we do not have a retailer’s delivery time, 3 working days are allowed; you can set your own for each supplement.

Where do the prices come from?

The same prices as the rest of the site, checked daily at 34 UK retailers (last on 20 October 2026). “Today’s prices” is the cheapest in-stock price of the same product. Always confirm the price on the retailer’s site.

Does it suggest what to take, or how much?

No. The supplements and the amounts are yours; the site compares prices and does not recommend any. If you take medication, are pregnant or have a health condition, check with a pharmacist or GP.