How to check what is in your food
A food label lists everything in a product, but it is written to be technical, not readable. An ingredient-checking app fixes that. You scan the barcode, and it turns the fine print into a plain answer: what is in there, which parts are worth a second look, and why.
What these apps actually do
The barcode is the key. It identifies the exact product, so the app can pull its ingredient list and grade it. A good one does three jobs at once. It translates the additives (those E-numbers and chemical names) into words you recognise. It flags the ones a regulator has raised concerns about. And it gives the product an overall score so you can compare two options on the same shelf in a second.
What separates a good one from a bad one
Coverage comes first. If the app does not recognise the products you buy, it is useless, and a lot of apps built for the US market miss European brands. After that, look at how it handles additives. The weak apps hide everything behind a single number. The good ones explain each additive and show you where the rating comes from, so you are not asked to trust a black box.
Yuzu Health is built around EU labelling for exactly this reason. Every E-number gets a plain-English explanation and a rating drawn from EFSA opinions, with the source attached. More on how it works.
Reading the result
One thing worth knowing so you read scores correctly: a low rating usually points at a specific additive or a genuinely poor nutrition profile, not just the presence of sugar. If you want to understand a single ingredient in depth, our additive directory covers every E-number, and this guide explains how to judge whether one is safe.