How to Read a Food Label: A Guide from The Logan Institute
At The Logan Institute, we see food as information for your body, not just fuel. Reading a food label is one of the simplest ways to understand what you’re really eating and how it will impact your metabolism, gut health, and long-term wellness. When you know how to decode the label, you can choose foods that support healing rather than contribute to inflammation, blood sugar swings, or nutrient depletion.
What Is a Food Label and What’s Required?
In the U.S., most packaged foods are required to carry a standardized Nutrition Facts label and basic product information so consumers can make informed choices. By law, these labels must include: a statement of identity (what the food is), net quantity of contents, a Nutrition Facts panel, an ingredient list, major allergen declarations when applicable, and the name and address of the manufacturer, packer, or distributor.
The FDA also sets rules for how this information must appear, including minimum type sizes, standardized serving sizes, and the way ingredients and nutrients are named and listed. While this system is not perfect, it gives you a powerful tool to quickly compare products and spot foods that align, or conflict, with your health goals.
Key Parts of the Nutrition Facts Panel
The Nutrition Facts panel is your starting point for assessing whether a food fits your personal plan. We teach patients to move through it in a consistent order: serving size, calories, nutrients to limit, and nutrients to prioritize.
1. Serving size and servings per container
The top of the panel lists the serving size (in familiar household measures and grams) and the number of servings per container. All the calories and nutrient amounts printed on the label apply to this serving size, not the whole package, so if you eat double the serving, you’re doubling everything (calories, sugar, sodium, etc.).
2. Calories per serving
Calories tell you how much energy you’ll get from one serving. From a functional medicine perspective, we care not only about the number of calories but also their quality, whether they come mostly from refined carbohydrates, added sugars, unhealthy fats, or more nutrient-dense ingredients like whole foods and healthy fats.
3. Nutrients to limit
Midway down the label you’ll see total fat, saturated fat, trans fat, cholesterol, and sodium. Most people benefit from limiting saturated fat, trans fat, and sodium, which in excess are associated with higher risk of cardiovascular disease and hypertension. We also look closely at:
Added sugars: These are sugars that are added during processing (like cane sugar, syrups, honey), not those naturally present in whole foods. High added sugars can worsen insulin resistance, fatty liver, and inflammatory conditions.
Refined carbohydrates: While not labeled as “refined,” a high total carbohydrate with low fiber and high added sugar often indicates a highly processed product.
4. Nutrients to get more of
Lower on the panel you’ll find fiber, vitamins, and minerals such as vitamin D, calcium, iron, and potassium. These nutrients are listed because they are commonly under-consumed and play a key role in bone health, immune function, blood pressure, and energy metabolism. In our clinic, we especially encourage higher fiber intake (from real foods), adequate magnesium, potassium, vitamin D, and iron when indicated by labs.
5. % Daily Value (%DV)
The % Daily Value tells you how much one serving of the food contributes to a typical day’s intake based on a 2,000-calorie diet. As a rule of thumb, 5% DV or less per serving is considered low for a nutrient, and 20% DV or more is considered high. We usually aim for:
Low %DV in saturated fat, sodium, and added sugars
Higher %DV in fiber, vitamins, and minerals that align with your personal needs
Because %DV is based on a general population, it may not match your individualized targets, especially if you have specific diagnoses, are very active, or are on a therapeutic nutrition plan, but it remains a useful quick comparison tool.
Ingredient List, Allergens, and “Other” Information
The ingredient list is often the most revealing part of the label. From a functional medicine standpoint, this is where we uncover ultra-processed ingredients, potential triggers, and hidden sources of sugar or inflammatory fats.
1. Ingredient order and quality
Ingredients must be listed in descending order by weight, from most to least. If sugar, refined flour, or cheap seed oils (like refined soybean or corn oil) appear among the first few ingredients, the product is likely not aligned with a whole-food, anti-inflammatory pattern. We tend to favor products with shorter lists made up of recognizable, minimally processed foods.
2. Allergen statements
Major allergens, such as milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soy, must be clearly declared either in parentheses in the ingredient list or in a “Contains” statement. This is critical if you have food allergies, autoimmune conditions, or suspected sensitivities; we often use these statements, along with symptom tracking and lab data when appropriate, to help identify triggers.
3. Manufacturer and contact information
Labels must provide the name and address of the manufacturer, packer, or distributor. This lets you verify the brand, visit their website to check for quality standards or sourcing information, and contact them with questions about ingredients or potential allergens. For patients with complex health concerns, we sometimes go one step further and look for brands that share testing data, farming practices, or certifications.
Front-of-Package Claims vs. Reality
Many people make decisions based on the front of the package, claims like “natural,” “high protein,” “immune support,” or “heart healthy.” From our perspective, this is where confusion often starts. These phrases are marketing, while the Nutrition Facts and ingredients are the facts.
Industry and regulators are exploring ways to put clearer nutrition information on the front of packages (such as simplified icons or “Facts Up Front” systems), but research shows that labels only improve choices when people understand what they mean and still turn the package over to look at the full panel. In our clinic, we encourage you to view any front-of-pack symbol or claim as an invitation to investigate the back, not as a green light by itself.
How We Recommend You Use Food Labels
Our goal is not for you to obsess over every number, but to build a confident, sustainable habit of label reading that supports your unique physiology and goals. Here’s a simple sequence we teach:
Read the full ingredient list and watch for added sugars (under different names), refined grains, artificial colors, industrial seed oils, or any ingredients you don’t recognize. Look up anything unfamiliar, or simply scan it with the Yuka App.
Next look at the serving size, then mentally adjust calories and key nutrients to reflect how much you actually eat.
Scan calories together with added sugars and refined carbs to understand blood-sugar impact.
Check saturated fat and sodium, aiming for lower amounts and %DV unless you have a specific therapeutic reason to do otherwise.
Look for fiber and beneficial nutrients you want more of, such as potassium, iron, and vitamin D.
Confirm allergen and manufacturer information if you have sensitivities or want to investigate quality.
When patients consistently apply this framework, they tend to gravitate toward simpler, more nutrient-dense foods and feel more in control of their health.
Spotlight: The Yuka App
If you’ve ever wondered what’s really in your food or personal‑care products, the Yuka App makes it incredibly easy to find out. Just scan an item, and Yuka breaks down the ingredients, rates the product’s overall health impact, and even suggests cleaner alternatives. It’s a simple way to make more informed choices and support your long‑term wellness, one scan at a time.
Partner with Us on Food Choices
Food labels are a great start, but they don’t replace personalized guidance. At The Logan Institute, our lifestyle coaching helps you turn label information into everyday eating habits that support your specific goals and lab findings. We’ll review your usual foods, teach you simple label shortcuts, and guide you toward realistic upgrades so every grocery trip moves you closer to your health goals.