High protein vs source of protein: the GB label rules
Protein claims depend on the share of energy from protein, not simply the grams printed on the front. Work through two example lab...
The label decoder
What a British food packet is legally allowed to claim, and what it has to mean.
High fibre vs source of fibre: the GB thresholds
There are two ways to meet a fibre claim. See the per 100g and per 100 kcal rules, with a worked example and portion arithmetic.
No added sugar vs low sugar: what the label means
No added sugar describes the recipe; low sugar describes a quantity. Understand the difference before comparing two snack packets.
Per 100g vs per serving: compare food labels fairly
Put two packets on the same basis, calculate your own portion, and avoid mixing dry and prepared values or grams and millilitres.
What this section is for
"High in protein" is not a marketing phrase. It is a regulated claim with a threshold behind it, and so are "source of fibre", "light", "reduced fat" and most of the other words on the front of a packet.
Almost nobody writes about what those thresholds actually are. This section does, one claim at a time: what it means, what a product has to contain to say it, and what it does not tell you.
We do not name products, compare prices or recommend anything. The point is that you can pick up any packet and do the arithmetic yourself.
Start with the guides below, or use the portion calculator to put label values into a weighed serving. How we write explains the standard everything here is held to.