Written by Tammy Mish, CN, CMTA. This informative article breaks down the key sections of a supplement label, helping you understand what they mean so you can make informed purchasing decisions with confidence.

A Smart Shopper’s Guide 

Shopping for supplements can feel overwhelming. Two products may look similar on the shelf, yet differ significantly in quality, potency, sourcing, and transparency. Understanding how to read a supplement label can help you make informed decisions and choose products that align with your health goals.

Labels should be clear, accurate, and transparent. Honest labeling practices that help consumers know exactly what’s in the bottle is of high priority. In this guide, we’ll walk you through the key sections of a supplement label and explain what they mean so you can shop with confidence.

Quick Tips for Reading Supplement Labels

1. Check the serving size first
2. Compare ingredient amounts, not just bottle size
3. Look for clearly disclosed ingredient quantities
4. Review allergen information
5. Check suggested usage directions
6. Look for third-party certifications and quality standards

Dietary Supplements are a “Special” Foods Category

One way to determine whether a product is a conventional food or a dietary supplement is to check its label in two areas.

1. On the front of the label, for a supplement, the word “supplement” is prominently displayed,
2. On the side of the label at the top of the chart, it should be clearly displayed “Supplement Facts” for supplements or “Nutrition Facts” for conventional foods.

A typical label can be divided into three sections.

The three sections correspond to the three panels, which are detailed later in the article.

Section One – Health Function Category:

This section on the front of the label provides a quick reference to help you decide how this supplement can support your health.

The main role and/or formula information section gives you a quick read on what distinguishes this formulation. It mainly includes structure and function claims that explain how the product primarily affects the body’s structure and function.

Section Two – Understanding the Supplement Facts Panel 

Serving Size: 

This is one of the first things to check on any supplement label. The serving size tells you how much of the product you need to take to receive the listed amounts of nutrients and ingredients.

Amount Per Serving and Percentage of Daily Value: 

The first column in this section tells you the amount of nutrients and key ingredients per serving. This is usually declared in micrograms (mcg), milligrams (mg), grams (g) or international units (IU). When comparing products, always pay attention to both the amount and the unit of measurement. A product containing 500 mg is very different from one containing 500 mcg based on the nutrient being delivered.

The second column shows the percentage of the recommended Daily Value (DV) for a given nutrient. The FDA regulates the allowed nutrients and sets the DV that manufacturers must declare on labels based on RDAs.

It’s important to keep in mind a couple of things when looking at the percentage of daily values (%DV):

• When macronutrients are declared (fats, carbohydrates, protein), these recommended daily values are based on a 2,000-calorie diet. Depending on your age, health status, and activity level, your ideal diet may vary from this amount.
• In general, less than 10% DV is considered low for that nutrient. If a supplement contains 20% DV or more of a nutrient, it is considered high in that nutrient.
• Many ingredients or nutrients will not have a number listed in the percentage daily value column. This is because the US Institute of Medicine has not issued an official RDA as a recommendation on how much of this nutrient you should consume. It doesn’t mean they are not potentially beneficial to have in your diet.

Key Ingredient Potency: 

• This section highlights the ingredients that provide the product’s intended benefits and helps you understand exactly what you’re getting in each serving.
• Indented ingredients indicate that this ingredient is a component of the above-not-indented listed ingredient. In this example, EPA and DHA are the main components of omega-3 fatty acids, and omega-3 fatty acids are components of fish oil.
• Some brands use proprietary blends, which allow manufacturers to list a total amount for a group of ingredients without revealing the amount of each ingredient inside the blend. While permitted by regulations, proprietary blends can make it difficult for consumers to evaluate potency and compare products.

Additional Ingredients and Allergen Information:  

• Ingredients that are not key to a supplement’s nutritional benefits – like the ingredients used to make gel capsules, fillers, binders, etc. – are listed in this section.
• In this ingredient list and/or immediately below it, you will also find any allergens listed, if present in the product, as well as any warnings about potential allergen cross-contamination. Be aware that while manufacturers are required to list nine major allergens, they are not required to mention the potential for cross-contamination from shared manufacturing equipment. Look for a brand that declares potential cross-contamination.

Additional Logos: 

Look for brands that work with third-party certifiers to ensure that products are manufactured following specific rules.

Section Three – Important Product Information Beyond the Supplement Facts Panel

Suggested Usage: 

This section explains when to take a supplement, how many to take per serving, and how many to take each day. Look for guidance on how best to take it (with a meal, with a fat containing meal, on an empty stomach, before bed, etc.) to achieve optimal results. The suggested usage should be carefully crafted by formulators and a toxicologist to ensure maximum efficacy while preserving safety.

Qualified Health Claims: 

There are two types of Health Claims allowable by the FDA in supplement labeling: 1) FDA-Approved Health Claims and 2) Qualified Health Claims. FDA-Approved Health Claims are approved statements establishing the specific relationship between a nutrient and a disease or risk of disease. These statements are scientifically supported and accepted by the scientific community and backed by years of clinical evidence. On the other head, supplements may bear a Qualified Health Claim, which has a similar purpose on labels, but their scientific support is not as strong. Like Health Claims, these statements establish a relationship between a specific nutrient and risk of disease but must bear a disclaimer that the evidence is not conclusive. The FDA allows these claims on supplement labels but may exercise enforcement discretion with emerging scientific data.

While these claims are allowed on labels, and use disease language, other disease claims and statements are not allowed on supplement labeling as a supplement is intended to support a healthy individual’s biological structure and function.

Functional Description: 

It explains the product’s functions and how it will support your health. The brand should have a team of scientists who ensure the claims listed in this section are scientifically substantiated and truthful, not misleading.

Caution: 

This section would be best written with the support of a toxicologist. This section alerts you to the precautions to follow before taking the product and the possible ways the supplement may cause discomfort or adverse reactions. A quality brand will craft the products with care to minimize the potential for adverse reactions.

Additional Information: 

This optional section details whether the product has specific storage instructions to maintain freshness and whether it may change color over time.

Approximate Size: 

This optional diagram shows you the approximate size of the supplement. If you are concerned about swallowing large pills, this will help you decide if this specific supplement will work for you.

Best If Used By Date:

Check the Best If Used By date (expiration date), which is typically located on the product label or the bottom of the bottle. Additionally, look for the lot number or batch number, as every bottle should have one for product identification and verification purposes.

Transparent & Trustworthy Labels

A supplement label is more than just a list of ingredients. It’s a valuable tool that can help you evaluate quality, transparency, and value.

By understanding how to read the Supplement Facts panel, ingredient lists, usage directions, and certifications, you can make more informed decisions about the products you choose.

A high-quality supplement manufacturer should be committed to providing clear, accurate labeling backed by rigorous testing and quality standards, so you can feel confident about what’s inside every bottle.