Practical guides for the supermarket: how to read Nutri-Score, what E numbers mean, and how to avoid a surprise at the till.

What E numbers are, how they are grouped, which ones genuinely deserve attention, and where to stand between panic and indifference.

Where the gap between your mental total and the real one comes from, how to read unit pricing, and practical ways to know the number before you reach the checkout.

How the A to E letter is calculated, what it leaves out, and how to read it correctly when you are comparing two products on the shelf.