How a price per unit is made

For every product a store lists, we read its price, whether it is in stock, and what the pack holds: its weight, its number of servings or its number of capsules. Where a store publishes this in a form we can read directly, we read it there; otherwise we extract it from the product page.

Every category is compared on one basis, and every product in it is priced on that basis. Where a pack states its size in a way we cannot read, the product is shown without a price per unit rather than with a guessed one.

per kg

Powders and everything else sold by weight.

per serving

Products whose label counts servings.

per capsule

Capsules, tablets and softgels, counted one by one.

Prices are checked continuously. Products whose price changes often, and products near the top of a ranking, are checked more often than the rest. Every country site shows when its market was last scanned.

• Quality, purity or effect. We compare what a product costs per unit, not what it does.
• The same item across stores. Each store's listing stands on its own: we compare listings per unit and never claim that two stores sell one identical product.
• Countries in one ranking. Each market is scanned and ranked on its own, in its own currency.

Some buy links are affiliate links: a store may pay a commission when someone buys through one. Commission plays no part in the order. Rankings follow the price per unit.

• Netherlands · 38 stores · 18,577 products listed
• Belgium · 25 stores · 7,047 products listed