Food labels are designed to be read quickly and understood selectively. The parts manufacturers want you to see are large, colourful, and placed on the front of the packaging. The parts that would actually change your purchasing decision are small, technical, and buried on the back.
I’ve spent 20 years working in food quality and the supplement industry. I read labels professionally. And I can tell you that most people — even health-conscious people who genuinely care about what they eat — are looking at the wrong things.
This is not about becoming obsessive or spending twenty minutes in a supermarket aisle. It’s about knowing which four pieces of information actually tell you something useful — and ignoring the rest.
“The front of a food package is advertising. The back of a food package is information. Most people spend their time on the wrong side.”
Before anything else — ignore the front of the package
Completely. The front of a food package is a marketing space regulated differently from the nutrition information on the back. Claims like “natural,” “wholesome,” “high in protein,” “made with real fruit,” “no added sugar,” and “light” are controlled by marketing departments, not by the same rules that govern the ingredients list.
“No added sugar” can appear on a product that is still very high in sugar — just naturally occurring sugar. “Made with real fruit” can appear when fruit constitutes 2% of the product. “Natural” means almost nothing in most labelling frameworks.
Turn it over. Start from there.
The 4 things that actually matter
What to look for: Is the first ingredient something you’d recognise in a kitchen? Whole wheat, chicken, oats, olive oil — these are positive signals. If the first ingredient is sugar (in any of its many names), refined flour, or an oil, the product is built on a cheap foundation regardless of what the front claims.
Where to look for sugar specifically: Sugar is frequently split across multiple ingredients to prevent it from appearing at the top of the list. A product might contain glucose syrup, fructose, dextrose, and maltodextrin — four different sugars — each appearing further down the list individually, even though combined they would be the dominant ingredient. This is legal. It is also deliberately confusing.
What to look for: Check the serving size before reading any other nutritional value. A “serving” of breakfast cereal is often 30g. Weigh out 30g of cereal. It is a very small bowl. A “serving” of peanut butter might be one teaspoon. A “serving” of certain soft drinks might be defined as half the bottle.
The rule: Always multiply the per-serving values by the number of servings you actually consume. A product with 10g of sugar “per serving” is a 30g sugar product if you consume three servings — which is entirely normal for something like granola or crackers. The per-serving number is only useful when the serving size is realistic.
What it means: A long ingredient list is not automatically bad — a multigrain bread with many whole grain components is an example. But a long list of emulsifiers, stabilisers, artificial colours, flavour enhancers, and preservatives indicates a product that is being engineered to behave, look, or taste a certain way that its base ingredients alone would not produce.
The useful question: Could you make this product at home from recognisable ingredients? Not whether you would — just whether you could. If the answer is no, it’s because the product relies on industrial additives that have no home equivalent.
Simple benchmarks: Under 5g per 100g is low sugar. 5–10g is moderate. Over 10g is high. Over 20g is very high. Some “healthy” breakfast products — granolas, fruit yoghurts, protein bars — register between 15–30g per 100g. That context is useful.
Free sugars vs total sugars: Where the label distinguishes between total sugars and “of which sugars” or “added sugars” — pay attention to the added sugars figure. Naturally occurring sugar in whole fruit, plain dairy, or vegetables behaves differently metabolically than added refined sugar. A plain yoghurt with 5g of sugar from lactose is not the same as a flavoured yoghurt with 5g of sugar from added syrup, even though the label number is identical.
The hidden sugar problem — names to recognise
Sugar appears on food labels under dozens of different names. This is not accidental. Manufacturers use multiple sugar sources partly for functional reasons — different sugars behave differently in cooking and processing — but the effect on the label is that sugar’s presence is distributed and obscured.
Here are the most common alternative names for sugar you will find on food labels:
A product containing glucose syrup, fructose, and fruit juice concentrate has three separate sugar sources that would appear at three separate points in the ingredients list — each one individually lower than if they were combined and labelled as “sugar.” The total sugar content is identical. The label impression is not.
Scan the ingredients list for any word ending in “-ose” (glucose, fructose, dextrose, maltose, sucrose) and any word containing “syrup,” “juice concentrate,” “nectar,” or “malt.” Count how many you find. If there are three or more, the product’s sugar content is almost certainly higher than the list position of any single ingredient would suggest.
What about calories, fat, and sodium?
These three values dominate most people’s label-reading attention — and they are genuinely less useful than the four things above as standalone signals.
Calories are useful for overall energy balance but tell you nothing about food quality. 200 calories of almonds and 200 calories of a processed snack bar are not equivalent in any meaningful nutritional sense, despite sharing the same number. Using calories as a primary quality indicator leads to low-calorie highly processed choices that are nutritionally inferior to higher-calorie whole foods.
Fat has been rehabilitated as a concern in most nutritional frameworks — the type of fat matters enormously, and total fat content is a poor proxy for quality. Avocados, olive oil, and fatty fish are high fat products with strong nutritional profiles. Many low-fat products compensate by adding sugar, starch, or additives to restore palatability. “Low fat” on the front of a package is frequently a warning sign, not a recommendation.
Sodium is worth monitoring for people with cardiovascular concerns or high blood pressure — but again, per-serving figures need the serving size correction to be meaningful.
“The most useful thing you can do in a supermarket is turn the product over before you put it in your basket. Most people do it after — if at all.”
Health claims — what the regulations do and don’t protect you from
In the EU, nutrition and health claims on food labels are regulated — a manufacturer cannot simply state that a product “improves heart health” without meeting specific criteria. This regulation is genuine and meaningful.
What it does not regulate: implied health associations, lifestyle imagery, colour choices, packaging design, and many front-of-pack claims that are technically accurate but practically misleading. A biscuit marketed with an image of fresh fruit, described as “made with real fruit,” containing 3% fruit purée in an otherwise sugar-and-refined-flour product, is compliant with most labelling regulations.
The regulations set a floor, not a ceiling. They prevent the most egregious lies — they do not prevent sophisticated misdirection.
Step 1: Ignore the front entirely. Turn it over.
Step 2: Find the ingredients list. What is the first ingredient? Is it recognisable?
Step 3: Count the ingredients roughly. More than 15 with unrecognisable names — proceed carefully.
Step 4: Scan for sugar aliases — any “-ose” words, any syrups, concentrates, nectars.
Step 5: Find total sugar per 100g. Apply the benchmark: under 5g low, 5–10g moderate, over 10g high.
That is everything. It takes 60 seconds once you know what you are looking for. You don’t need to memorise macros, calculate percentages, or cross-reference a database.
Putting it together — a real example
Consider a “healthy” fruit yoghurt marketed with images of berries and a “no artificial colours” claim on the front. Turn it over.
Nothing on the front is technically false. Everything on the back changes the picture. This is a high-sugar, heavily processed product in health-coded packaging — and it is entirely normal on supermarket shelves. The front and back of this label are describing two different products.
The point of all this
Reading food labels is not about achieving dietary perfection or eliminating every processed product from your life. It is about making deliberate choices — knowing what you are actually buying rather than what the packaging would like you to believe you are buying.
Once you know the four things that matter and where to find them, the supermarket becomes a different experience. Not an exhausting one — a clearer one. You stop reading the marketing and start reading the product.
And when a front-of-pack claim makes you feel good about a product, check the back. That feeling is usually what it was designed to produce.
Want the same label-reading approach applied to your supplements?
Download the free Supplement Insider’s Checklist — 7 ingredients I’d never buy, written by someone who reads labels professionally. Or book a Label Review and I’ll audit your entire stack for you.
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