Additives have a bad reputation, and a list of E numbers on a packet can feel like a warning. The reality is more boring and more reassuring: most additives are well studied, approved and present in tiny amounts. A few have more open questions. The skill is telling the difference without falling into fear.
What food additives actually are
An additive is anything added to food to do a job: keep it safe, make it last, or change its texture, colour or taste. An "E number" simply means the additive has been assessed and approved for use in the UK and Europe. So an E number is closer to a pass mark than a skull and crossbones.
They fall into a few broad families:
| Family | Job | Examples |
|---|---|---|
| Preservatives | Stop food spoiling | Some are naturally occurring, like vitamin C as an antioxidant |
| Colours | Change appearance | Often the most cosmetic, doing little for the food itself |
| Emulsifiers | Mix oil and water, improve texture | Common in spreads, sauces and packaged bread |
| Sweeteners | Sweetness without sugar | Used in "diet" and "no added sugar" products |
Most are fine, and that is the honest answer
For the large majority of approved additives, the evidence says they are safe at the levels used in food. Preservatives that stop you getting ill are a clear net good. A natural antioxidant keeping oil fresh is not something to fear.
It is worth keeping the dose in mind too. Approval is based on amounts far below where any effect is seen, with a wide safety margin. A single product with a few additives is rarely the thing worth worrying about.
This is food guidance, not medical advice. If you have an allergy or a specific sensitivity, always check the label yourself and speak to a qualified professional.
The few worth a second look
If you want to spend your attention wisely, a couple of areas have more open research questions:
- Some emulsifiers, where early research is exploring possible effects on the gut, though it is far from settled.
- A few sweeteners, where the science continues and individual tolerance varies.
- A very long additive list, which is less about any single ingredient and more a signal that the food is highly ultra-processed overall.
That last point is the useful one. A long additive list is often a clue about the kind of food you are eating, rather than proof that one additive is harmful.
Care about additives? forme flags them
Choose the goal that matters to you and forme highlights additives as part of a personal score, with no scaremongering.
How to keep perspective
- Treat a short ingredients list as a good sign, not a strict rule.
- Do not panic over a single E number, especially a preservative or antioxidant.
- Notice the overall picture: lots of additives usually means a heavily processed food, and that is the more useful thing to act on.
Where forme fits
Some people care a lot about additives, and some barely at all. forme lets you choose. If fewer additives is one of your goals, forme highlights them in a product's score and explains why, in plain language, without ever calling a food bad. If it is not your priority, the score quietly focuses on what is. Either way you get a personal read on your food, and your whole day, rather than a one-size-fits-all warning.