Reading Food Labels With Confidence
Food labels can feel confusing at first. This guide explains the main parts in plain English, so you can compare products more easily and make informed choices.
Food labels are designed to help you understand what is in a product, but they can still feel busy and hard to compare. A few simple checks can make the process much easier.
You do not need to analyse every number on every pack. In many cases, the most useful approach is to focus on a handful of key details and use them consistently.
Start with the serving size
One of the easiest ways to get confused is to look at the nutrition numbers without checking the serving size first.
A label may show values:
- per 100g or per 100ml
- per portion
- per pack
These are not the same. A product can look lower in sugar, fat or salt simply because the stated portion is small. That is why the per 100g or per 100ml column is often the best place to start when comparing similar foods, such as two cereals or two ready meals.
Helpful questions to ask yourself:
- Am I likely to eat the stated portion, or more?
- Is this pack meant for one person or several?
- Am I comparing like with like?
Understand the traffic light system
Many UK foods use colour coding on the front of the pack. This is often called the traffic light system.
It usually highlights:
- fat
- saturates
- sugars
- salt
- energy, calories and kilojoules
In general:
- green means lower
- amber means medium
- red means higher
This can be a quick way to compare similar products at a glance. For example, if you are choosing between two soups, sauces or sandwiches, the traffic lights can help you spot the option that is lower in salt or saturated fat.
A red label does not automatically mean a food is "bad" and a green label does not automatically mean it is the best choice in every situation. The overall pattern of what you eat matters more than one single product.
Check the ingredients list
The ingredients list tells you what the product is made from. Ingredients are listed in order of weight, so the first few items usually make up the biggest share.
This can be useful if you want to:
- identify wholefood ingredients
- compare how processed two products are
- look out for added sugars, salt or sweeteners
- avoid ingredients you are allergic or sensitive to
Manufacturers may use several different names for similar ingredients. For example, added sugars may appear in different forms. Rather than focusing on one word, look at the whole product and compare similar items side by side.
If you have an allergy, always read the full label carefully, even on products you buy often, because recipes can change.
Look at sugar, salt and saturated fat in context
Many people turn straight to these parts of the label, and with good reason. They can be useful for comparing packaged foods.
Try using labels to compare foods within the same category, such as:
- breakfast cereals
- yoghurts
- pasta sauces
- soups
- snack bars
This is usually more helpful than comparing completely different foods.
For example, a plain yoghurt and a flavoured yoghurt may look similar, but the sugar content can be quite different. A tomato sauce can vary a lot in salt between brands. Small swaps, repeated regularly, can make a meaningful difference over time.
Do not forget fibre and protein
It is easy to focus only on what you may want less of, but labels can also help you spot foods that offer something useful.
Fibre can support digestive health and help you feel fuller after eating. Protein can also contribute to fullness and is an important part of a balanced diet.
When comparing products, it may help to look for options that contain:
- more fibre, especially in cereals, breads and snacks
- a useful source of protein, depending on the food type
- ingredients you recognise and would expect in that product
The best choice will depend on the type of food and how it fits into your wider eating pattern.
Be cautious with health claims
Packaging is designed to sell products, so front-of-pack claims can sometimes give a healthier impression than the full label supports.
Phrases such as:
- "high protein"
- "low fat"
- "natural"
- "no added sugar"
- "source of fibre"
may be true, but they only tell part of the story. A food that is low in fat may still be high in sugar or salt. A product with no added sugar can still contain a lot of naturally occurring sugar. That is why it is worth turning the pack over and checking the nutrition table and ingredients list for yourself.
A simple label-reading routine
If labels feel overwhelming, use this quick routine:
- Check the serving size.
- Compare the per 100g or per 100ml column.
- Scan the traffic light colours.
- Look at sugar, salt and saturated fat.
- Check fibre, protein and the ingredients list.
- Ignore marketing claims until you have seen the full picture.
You do not need to aim for perfection. Reading labels is simply a tool to help you make informed choices more often.
The bottom line
Food labels are most helpful when you use them to compare similar products and spot patterns, not to judge a single food in isolation. Start simple, stay consistent, and focus on the details that matter most to you.
If you have questions about your diet, a health condition, or how to choose foods that suit your needs, speak to a GP, dietitian or pharmacist for personalised guidance.
This article is for general information only and is not medical advice. For personal guidance, please consult a clinician or pharmacist.
More clinically reviewed articles: all health guides.