How to Read a Food Label (And What to Look For)

Most people glance at the calorie count and move on. But the nutrition facts panel and ingredients list together tell a much more complete story about what you are eating. This guide walks through both, section by section, in plain language.

What should you look at first on a nutrition facts label?

Start with serving size. It is printed at the very top of the panel, and every number below it is calculated for that exact amount. This matters more than most people realize. A bag of chips labeled "150 calories" may contain 2.5 servings. Eat the bag, and you have had 375 calories.

After serving size, scan the top three nutrients on the panel:

• Calories. The total energy in one serving. This number gets most of the attention, but it tells you nothing about what the food is made of.
• Sodium. Packaged foods are frequently high in sodium. One serving of canned soup can account for 30% or more of the recommended daily sodium intake for most adults.
• Added Sugars. The US updated its label format in 2020 to require a separate "Added Sugars" line, broken out from total sugars. This distinction matters: the sugar in a plain apple is not the same as the sugar added to a flavored yogurt.

The % Daily Value column (marked %DV) tells you how much of a nutrient one serving contributes toward a standard daily intake, based on a 2,000-calorie diet. The working rule: 5% or less is low, 20% or more is high. Use %DV to quickly identify foods with excessive sodium or saturated fat, or to spot products that contribute meaningful fiber or calcium.

A note on Canadian labels: Canadian nutrition facts panels are formatted slightly differently from US ones. Both require the same core information, but Canadian labels include a standardized Nutrition Facts table with mandatory %DV columns and specific allergen declaration rules. If you buy packaged food on both sides of the border, the panels will look similar but are not identical.

How is the ingredients list on a food label organized?

Ingredients are listed in order from most to least by weight. The first ingredient is the most abundant in the product; the last is present in the smallest amount.

Flip any packaged food over and read the first three ingredients. They define what the product essentially is. If the first three ingredients in a breakfast cereal are sugar, refined flour, and corn syrup, you have your answer regardless of what the front of the box claims.

A few things to look for as you read the list:

• Length. A long ingredients list is not automatically a problem, but it is a prompt to read more carefully. Foods with 20 or 30 ingredients often rely on multiple additives to achieve texture, color, or shelf stability.
• Recognizability. A short list of familiar names (oats, water, salt, honey) suggests a minimally processed product. A list dense with multi-syllable names or alphanumeric codes suggests significant processing.
• Artificial dyes. Colors like Red 40, Yellow 5, and Blue 1 have been approved for use in food, but their status is actively shifting. In April 2025, the FDA and major food manufacturers announced a voluntary commitment to phase petroleum-based synthetic dyes out of the food supply, with a target timeline of end of 2027. No binding regulation has been issued; the effort is a voluntary industry pledge. Until this transition is complete, you may still find them listed on current products. If this is a concern for your family, scan the ingredients list for any entry that reads "[Color] [Number]." We have a deeper look at one of the most common ones in our post Is Red 40 Safe?
• Hidden sugars. Manufacturers sometimes divide added sugars into multiple ingredients so that no single one appears high on the list. Common examples: cane sugar, brown rice syrup, dextrose, maltose, fruit juice concentrate. Each is sugar by a different name.

If parsing a long ingredients list at the grocery store sounds tedious, ingredient scanner apps can read the label for you instantly and flag anything worth a second look. NoJunk breaks down packaged food ingredients in seconds, so you can compare products without squinting at fine print.

What do front-of-package claims like "natural" or "no added sugar" actually mean?

Front-of-package claims are phrases on the front of the box, designed to catch your eye before you ever see the nutrition facts panel. They range from regulated claims with specific legal definitions to loosely defined marketing language with almost no enforceable standard.

• "Natural." In the United States, "natural" has no formal regulatory definition for packaged food. The FDA has said it generally means the product does not contain artificial ingredients or added color, but this is a policy guideline, not a strict legal standard. Because the FDA has never formally defined "natural," products with highly processed ingredients like high-fructose corn syrup have appeared on shelves with "natural" labels, and the FDA has not issued a rule explicitly prohibiting or allowing this. The same ambiguity applies to flavoring compounds: Natural vs Artificial Flavors: What the Label Hides explains why the gap between "natural" and "artificial" on an ingredient list is smaller than most people expect.
• "No added sugar." This one has a legal definition. It means no sugars or sugar-containing ingredients were added during processing. It does not mean the food is low in sugar, because the product may still contain significant naturally occurring sugars (think 100% grape juice).
• "Lightly sweetened." No regulatory definition. It means whatever the manufacturer decides it means.
• "Made with whole grain." There is no formal FDA rule governing this specific claim. It does not mean the product is primarily whole grain. If whole wheat flour appears third or fourth on the ingredients list and refined flour appears first, the product is mostly refined.
• "Gluten-free." This one carries an enforceable standard. In both the US and Canada, gluten-free claims are regulated with a maximum gluten threshold. For people managing celiac disease or gluten sensitivity, this label is meaningful.

The general rule: claims on the back of the package (the nutrition facts panel and ingredients list) are more reliable than claims on the front. When the front and back tell different stories, trust the back.