The Ultimate Guide: 5 steps to decipher nutrition labels at the grocery store

Let’s be honest: reading a food label can feel like cracking a secret code. Between the nutrition jargon, never-ending ingredient lists, and slick marketing with its catchy claims, it’s easy to get lost. But at their core, labels are actually simple: they’re there to give you clarity and help you make healthier choices.

In this article, you’ll learn how to decipher nutrition labels in five easy steps, turning what once felt like a headache into a powerful everyday ally for your health!
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1. Serving size: the first reference point not to ignore

The first thing to check is always the serving size indicated at the top of the table, since all nutritional values are calculated based on it. To make a fairer choice, keep these reference points in mind:

• Always compare your actual portion consumed to the one indicated on the product to avoid any underestimation
• Be wary of quick comparisons: if you compare two products from different brands, the serving sizes may vary, thus skewing the results of your analysis.
• Bring the products to an equivalent base using a cross-product calculation (e.g., based on the same quantity or 100g) to compare them adequately and ensure you are making the right choices.

With a little practice, these adjustments become quick and help you make more informed choices without complicating your life.
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2. Beyond calories: an incomplete data

Calories simply tell us the amount of energy provided by a food, but they do not reflect its nutritional quality. In reality, this energy comes from the three main macronutrients: carbohydrates, proteins, and fats (lipids). Therefore, it is mainly the distribution among these nutrients that is interesting to analyze to understand where these calories come from and how they will influence your energy and satiety.

Two products may contain the same number of calories but have very different effects on your body. For example, a snack rich in fiber and protein will keep you full longer and support your energy better than a product with the same number of calories but mainly composed of quick sugars.
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3. Key nutrients to look for: depending on the product being analyzed

Nutrient analysis varies depending on the type of food you are examining. For example, if you need to choose the best type of cookie, the focus will mainly be on carbohydrates and fats, and much less on proteins, which are generally not very present in this type of product. By adjusting your reading based on the product type, you save time and focus on the information that truly matters for your health and dietary choices.
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Carbohydrates: the main energy source to qualify

The amount of carbohydrates indicated in the Nutrition Facts table includes fiber, starch, and sugars. Carbohydrates are the body's preferred energy source, especially for the brain and muscles. The important thing is mainly to look at their quality:

• Fiber: the richer a food is in fiber, the better it supports satiety and digestion.
• Sugars: to be monitored, especially if present in large quantities. Look at the ingredient list to identify if they are added or natural sugars (e.g., from fruits).
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Fats (lipids): to choose wisely

Fats are essential to the body, but in processed products, they can quickly increase calories since they are very energy-dense. It is therefore important to look at the type of fat:

• Saturated fats: to be limited, as they are associated with less favorable effects on cardiovascular health.
• Trans fats: now banned in Canada, with the exception of those naturally present in very small quantities in certain animal products.
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4. The % daily value: a simple and practical tool

The Percent Daily Value (% DV) indicates the proportion of average daily needs that a nutrient represents for a given serving. It is a very practical tool for quickly assessing a product's nutritional quality, without having to analyze everything in detail. Here is a simple rule to guide you:

• 5% DV or less = low content. To be favored for nutrients to limit, such as saturated fats, sugars, and sodium (ideally 10% DV or less for the latter).
• 15% DV or more = high content. Interesting for nutrients to favor, such as fiber, iron, and calcium.

That said, these benchmarks may vary depending on the product type. For example, the thresholds may be slightly higher for complete ready-to-eat meals.

Finally, keep in mind that the % DV is based on the average needs of the population, and not on your personal needs. Age, sex, activity level, and your health status always influence how these values are interpreted.
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5. The ingredient list: the truth behind the label

The ingredient list complements the information in the nutrition table and lets you know exactly what a food contains. Ingredients are always listed in descending order by weight: the first ones are therefore those that make up the largest part of the product.

A few points to observe:

• Main ingredients (at the top of the list): if sugar, syrup, or processed fats appear at the top of the list, it indicates that they dominate the composition.
• Hidden sugars: sugar can hide under several names, such as dextrose, maltose, corn syrup, or concentrated juice. Spotting them allows you to evaluate the actual added sugar content.
• The length of the list: a short and simple list often indicates a less processed product, but this is not a universal rule. Be careful with shortcuts and take the time to read each ingredient and get adequate information about them.

Practical Tip: choose products whose first ingredients are natural foods (fruits, vegetables, whole grains, legumes).
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Nutrition claims: marketing or information?

"Natural," "healthy," "light," "protein-rich"... these terms don't mean much without context and are therefore not always synonymous with a better choice. A claim highlights a specific aspect of a product, sometimes to the detriment of the rest. Only reading the complete label allows the claim to be put into perspective.
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There are no good or bad choices

Ultimately, although it may seem contradictory, there are no good or bad choices in nutrition. Labels are not there to make you feel guilty or to prevent you from buying certain products, but to help you identify healthier and more nourishing options in your daily choices.

No need to scrutinize every product: every food can find its place in a balanced diet. The idea is to develop conscious habits, without depriving yourself or stressing out.

To go further and learn how to use labels according to your needs and lifestyle, book an appointment with a registered dietitian nutritionist who will guide you step by step toward informed and sustainable choices.

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