The ingredients worth actually caring about
Out of the hundreds of additives on the market, a small number are worth a decision at the shelf. The rest are acidity regulators, thickeners and colours that have been through safety review and are unremarkable at normal intake.
| On the label | What it is | Why it is worth a look |
|---|---|---|
| Sodium nitrite (250, 251) | Curing salt in processed meat | Forms nitrosamines at high heat; the meat itself is the bigger issue |
| Sodium metabisulphite (223) | Preservative in wine, dried fruit | Genuine trigger for asthma and sulphite sensitivity |
| Tartrazine (102), sunset yellow (110) | Synthetic colours | Linked to hyperactivity in some children; banned or labelled in parts of Europe |
| Aspartame (951) | Artificial sweetener | Should be avoided by people with phenylketonuria; otherwise debated, not settled |
| Potassium bromate | Dough improver | Banned in many countries; a genuine concern, still used in some markets |
| Trans fats / partially hydrogenated oil | Hydrogenated vegetable oil | The one on this list with the strongest evidence of harm |
| Maltodextrin | Refined starch | Not dangerous, but a marker of heavy processing and a big glycaemic hit |
| "Vegetable oil" | Unspecified blend | You cannot assess what is not named — usually palm or a refined seed oil |
Why ingredient scores are misleading
Scores need a formula, and a formula has to add up things that do not add up. Three mildly "amber" ingredients can total the same as one genuinely risky one, and the shopper sees the same number.
They also can be gamed. Reformulating with a different thickener or swapping a flagged colour for an unlisted natural colour moves the score without making the product meaningfully better. If the score is the goal, the food is not.
And they cannot see the thing that matters most, which is the composition of the product rather than its additives. A yoghurt with one preservative is a better buy than a cereal bar with none, because the additives were never the main question.
How to read an ingredient list in ten seconds
- Count the ingredients. Under five is usually unprocessed; over fifteen is usually engineered.
- Read the first three. Ingredients are listed by weight, so the first three are most of what you are eating.
- Look for sugar under its other names — maltodextrin, glucose syrup, invert sugar, fruit juice concentrate, rice syrup.
- Look for unnamed categories: "vegetable oil", "flavours", "spices" and "colourings" all hide the specifics.
- Check the additive numbers against a reference you trust, rather than trusting a green tick.
The honest limits of this tool
It reads the label you give it, so it knows exactly what the manufacturer chose to print. It cannot know the quantities, which is where most of the risk lives — carrageenan in a small amount is not the same as carrageenan as the third ingredient.
It also cannot look at the product as a whole. A block of butter with three ingredients is not healthier than a tin of tomatoes with four.
Treat the output as a reading aid rather than a verdict, and use it to decide what to look up properly, not to decide what to eat.
Every ingredient-scoring app I have tried has the same flaw: a number. Green 92, amber 54, red 21. The number feels authoritative and it is almost entirely made up, which is worse than useless when a genuinely risky additive and a harmless colour sit at the same grade.
What a shopper actually needs is narrower and more honest. Which ingredients on this label are worth a second look? What are they? Is the concern real, or is it a chemical name that sounds frightening and is not?
So this tool gives you the reason instead of the score. Where the evidence is thin, it says the evidence is thin. Where an ingredient is fine, it says that too, because a list where everything is flagged teaches you nothing.
Frequently Asked Questions
Yes — paste or photograph an ingredient list and it returns each ingredient worth knowing about, what it is, and the specific reason it is flagged. It deliberately does not produce a single health score, because those scores are not derived from evidence.