How to read a food label: A simple, practical guide to understanding what you’re really eating.

Eating with intention: how to read the nutrition label without losing your mind

In the clinic, I usually ask you a simple question:
“How often do you read the nutrition label on what you buy?”

Most people shrug, smile a little embarrassed, and tell me something like:
“Doctor, almost never… I’m always in a hurry!”

And I get it. You and I do many things on autopilot. We eat, shop, snack in front of the TV… without thinking too much about it. But even if you don’t notice, every day you eat around 3,000 calories. In one year, that’s more than a ton of food entering your body.

That ton is not just “food.” It’s information for your cells, your heart, your blood sugar, your blood pressure. That’s why today I want to talk to you about something I call the principle of intention: stop eating on autopilot and begin choosing with awareness.

Reading the nutrition label is a powerful tool to help you do that.

Why does reading the label matter so much?

Because the label answers two questions that look simple, but can change your health:

• What am I really eating?
• How much of it am I actually eating?

When you don’t look at the label:

• You believe you’re “eating very little,” but those “innocent” cookies have already added a lot of calories and sugar.
• You think something is “low-fat” because the package says it nicely, but in reality it’s full of added sugars.
• You have no idea how much salt you eat in a day… until your blood pressure goes up and reminds you.

When you read with intention, you start seeing what used to be hidden.
And that gives you the power to decide.

What exactly is the nutrition label?

It’s that box that usually says “Nutrition Facts” or “Información nutricional”. There you’ll find, per serving:

• Calories (energy)
• Types of fat
• Carbohydrates, sugars, and fiber
• Protein
• Sodium (salt)
• Some vitamins and minerals

Think of the label as a small map: it doesn’t tell you what you must do, but it shows you where you’re heading.

How to read the label step by step (without making it complicated)

1. ALWAYS start with the serving size

This is the trick almost everyone overlooks.

The label tells you: “Serving size” and how many servings are in the container.

All the numbers you see (calories, grams of sugar, etc.) refer to one single serving, not the whole package.

Example:
If a small bag of chips says:

• Serving size: ½ bag
• Servings per container: 2

And you eat the whole bag (which is the most common scenario), then everything doubles: calories, fats, sodium, sugars.

👉 Practical rule:
Before looking at any number, ask yourself:

“What I usually eat… is it one serving, half, or two or three?”

Adjust the numbers in your head according to what you actually eat.

2. Look at calories… calmly

Calories tell you how much energy one serving provides.

A typical adult often uses about 2,000 calories per day as a general reference. But this is NOT a strict law. It depends on:

• Your age
• Your sex
• Your weight and height
• Your level of physical activity

I don’t want you to live counting calories, but I do want you to have a basic idea:

• If something has a lot of calories in a very small volume (for example, a small bag with 400 calories), it’s probably very energy-dense and easy to overeat.
• If you’re trying to lose weight, it helps to choose foods with fewer calories and more volume (fruits, vegetables, vegetable-based soups, whole grains).

Remember: physical activity is another key pillar. Your body handles those calories much better if you move regularly.

3. Focus on key nutrients: what to limit and what to look for

This is where the label really starts working for you.

What you want to limit

• Saturated fats
• Trans fats
• Added sugars
• Sodium (salt)

General guidelines for an adult (there can always be individual adjustments):

• Saturated fats: less than 10% of your daily calories
• Added sugars: also less than 10% of daily calories
• Sodium: less than 2,300 mg per day
  (about one teaspoon of salt in the entire day, including what’s “hidden” in foods)

The less you see of these on the label, the better for your heart, your blood pressure, and your metabolism.

What you want to look for

• Fiber
• Vitamins and minerals like calcium, iron, potassium
• Good-quality protein

Fiber is a huge ally:

• Helps you feel full with fewer calories
• Regulates your digestion
• Supports weight control and blood sugar control

👉 In general, it’s recommended to get at least 25–30 grams of fiber per day.
Many people don’t even reach half of that.

4. Understand % Daily Value (%DV)

You’ll see a column that says something like “% Daily Value” (or “%DV”).

What does it mean?

It’s a guide that tells you how much one serving of that food contributes to what you should eat in an entire day.

• 5% or less → low in that nutrient
• 20% or more → high in that nutrient

How to use it:

• To limit: look for foods with low %DV in saturated fat, added sugars, and sodium.
• To increase: choose foods with high %DV in fiber, vitamins, and minerals.

You can also use it to compare products.
If you have two whole grain breads, for example, check which one has:

• More fiber (higher %DV)
• Less sodium
• Fewer added sugars

5. Read the ingredient list (that’s where the truth is)

The ingredient list is like reading the DNA of the product.

Ingredients appear from highest to lowest quantity.

If the first things you see are sugar (or its disguises: high-fructose corn syrup, syrup, honey, fruit juice concentrate, etc.), refined oils, and a long list of names you don’t recognize, it’s probably not the best option for daily use.

If you see words like whole grains, whole oats, beans, lentils, dried fruits without added sugar, that’s much better news.

👉 Simple rule:
The closer the food is to its natural state, the better for you.

A package with thirty ingredients trying to simulate a “apple-flavored something” is probably not what your body needs the most.

Front-of-pack labels: helpful, but not enough

Many products now include symbols or colors on the front:

• Traffic lights (green, yellow, red)
• Stars or scores
• Seals like “high in sugar,” “high in sodium,” etc.

These labels are a quick help. In just a few seconds, they let you know if you’re looking at something that probably helps or harms your health.

But be careful:

• Don’t rely only on the front of the package.
• Use these labels as an initial alert, and then turn the product around and confirm by reading the Nutrition Factsand the ingredient list.

Daily requirements: a guide, not a prison

General recommendations for adults usually fall in these ranges:

• Carbohydrates: 45–65% of daily calories
• Protein: 10–35%
• Total fat: 20–35%
• Fiber: at least 25–30 g per day
• Sodium: less than 2,300 mg per day
• Added sugars: less than 10% of daily calories

I don’t want you to stress over percentages. I want you to understand the idea:

Your daily eating pattern should lean toward whole foods: vegetables, fruits, whole grains, legumes, nuts and seeds… and away from highly processed products loaded with sugar, salt, and unhealthy fats.

Putting it into practice: quick guide for the supermarket

When you pick up a product, go through this mental checklist:

1. How many servings will I really eat?
2. How many calories per serving does it have, and where does that fit into my day?
3. How is it doing in saturated fat, added sugars, and sodium?
   • Is this something I want to include regularly, or better leave for “once in a while”?
4. How much fiber does it provide? Does it have important vitamins and minerals?
5. What does the ingredient list say?
   • Do I recognize what I’m reading?
   • Are there real, whole foods or just an endless list of additives?
6. Do the labels on the front match what I see… or were they trying to mislead me a little?

At the beginning, do this with just one or two products per shopping trip. You don’t have to review everything in one day. Like any skill, it gets easier with practice.

What would happen if you start eating with intention?

When you learn to read labels and look at your plate with new eyes, interesting things start to happen:

• You find yourself buying more fruits and vegetables without feeling punished.
• You choose whole grains because you already know they give you more stable energy.
• You drink more water and fewer sugary drinks because now you see how many grams of sugar they contain.
• You eat lighter and earlier dinners, and your sleep improves.
• Your daytime energy is more stable, your mood evens out, and you handle stress better.
• You feel better about yourself, and that shows in your relationships.

All of this connects with the pillars we always work on in lifestyle medicine:

• Eating based on whole, mostly plant-based foods
• Daily movement
• Restorative sleep
• Stress management
• Avoiding harmful substances
• Positive relationships

A simple label on a package can be the gateway to improving all these areas.

Final tips for healthier eating

• Fill half of your plate with fruits and vegetables of different colors.
• Choose whole grains (brown rice, oats, truly whole grain bread) instead of refined ones.
• Prefer lean and plant-based proteins: fish, beans, lentils, tofu, nuts, seeds.
• Use healthy oils like olive oil, in moderate amounts, instead of butter or solid fats.
• Drink water as your main beverage.
• Limit red and processed meats, deli meats, high-fat dairy, and sweets.

Eating with intention is caring for yourself with respect

My purpose with you is simple and profound at the same time:

That you make eating decisions that nourish your health and your daily life.
Not because someone forces you, but because you understand what you eat and you choose with intention.

Dr. Dan

If you have specific conditions (diabetes, high blood pressure, heart disease, kidney disease, among others), reading the label is even more important. In those cases, it’s ideal to do it together with your health care team, including nutrition.

If you still have questions about your diet or don’t know where to start, talk with a trusted health professional. You don’t have to do this alone.

Your path toward a healthier life can begin with something as simple as looking at your plate with new eyes… and giving a second look to that label you used to ignore.

When you eat with intention, you eat with awareness. And that, believe me, changes everything.

Dr. Dan

🌍 This article is also available in Spanish. Please use the language switcher in the top menu.

Sources

Kliemann N, Kraemer MVS, Scapin T, et al. Serving size and nutrition labelling: Implications for nutrition information and nutrition claims on packaged foods. Nutrients. 2018;10(7):891. doi:10.3390/nu10070891.

Persoskie A, Hennessy E, Nelson WL. US consumers’ understanding of nutrition labels in 2013: The importance of health literacy. Prev Chronic Dis. 2017;14:E86. doi:10.5888/pcd14.170066.

Kim EJ, Ellison B, Prescott MP, Nayga RM. Consumer comprehension of the Nutrition Facts label: A comparison of the original and updated labels. Am J Health Promot. 2021;35(5):648-657. doi:10.1177/0890117120983128.

Martini D, Menozzi D. Food labeling: Analysis, understanding, and perception. Nutrients. 2021;13(1):268. doi:10.3390/nu13010268.

Temple NJ, Fraser J. Food labels: A critical assessment. Nutrition. 2014;30(3):257-260. doi:10.1016/j.nut.2013.06.012.

Bhawra J, Kirkpatrick SI, Hall MG, et al. Correlates of self-reported and functional understanding of nutrition labels across 5 countries in the 2018 International Food Policy Study. J Nutr. 2022;152(Suppl 1):13S-24S. doi:10.1093/jn/nxac018.

Grummon AH, Gibson LA, Musicus AA, et al. Effects of 4 interpretive front-of-package labelling systems on hypothetical beverage and snack selections: A randomized clinical trial. JAMA Netw Open. 2023;6(9):e2333515. doi:10.1001/jamanetworkopen.2023.33515.

Anastasiou K, Miller M, Dickinson K. The relationship between food label use and dietary intake in adults: A systematic review. Appetite. 2019;138:280-291. doi:10.1016/j.appet.2019.03.025.

Variyam JN. Do nutrition labels improve dietary outcomes? Health Econ. 2008;17(6):695-708. doi:10.1002/hec.1287.

Mozaffarian D, Afshin A, Benowitz NL, et al. Population approaches to improve diet, physical activity, and smoking habits: A scientific statement from the American Heart Association. Circulation. 2012;126(12):1514-1563. doi:10.1161/CIR.0b013e318260a20b.

Afroza U, Abrar AK, Nowar A, et al. Global overview of government-endorsed nutrition labeling policies of packaged foods: A document review. Front Public Health. 2024;12:1426639. doi:10.3389/fpubh.2024.1426639.

Moore SG, Donnelly JK, Jones S, Cade JE. Effect of educational interventions on understanding and use of nutrition labels: A systematic review. Nutrients. 2018;10(10):1432. doi:10.3390/nu10101432.

Miller LM, Beckett LA, Bergman JJ, et al. Developing nutrition label reading skills: A web-based practice approach. J Med Internet Res. 2017;19(1):e16. doi:10.2196/jmir.6583.

Guo Z, Ning Y, Mustafa M. Impact of five types of front-of-package nutrition labels on consumer behavior among young adults: A systematic review. Nutrients. 2024;16(17):2819. doi:10.3390/nu16172819.

Roodenburg AJC. Nutrient profiling for front-of-pack labelling: How to align logical consumer choice with improvement of products? Proc Nutr Soc. 2017;76(3):247-254. doi:10.1017/S0029665117000337.

Van den Wijngaart AW. Nutrition labelling: Purpose, scientific issues and challenges. Asia Pac J Clin Nutr. 2002;11(2):S68-S71. doi:10.1046/j.1440-6047.2002.00001.x.