BlogWhat Does “Naturally Occurring” Mean on a Supplement Label?

What Does “Naturally Occurring” Mean on a Supplement Label?

Green Pasture Products / August 31, 2026

Page Contents

Introduction

Supplement labels contain a lot of information, including serving sizes, ingredients, amounts per serving, % Daily Value, and other valuable details. With so much information on a label, some of the terminology can be difficult to understand, especially when you’re trying to make thoughtful choices about the products you bring into your home and give to your family.

One phrase you may see on some labels is “naturally occurring.” But what does that phrase actually mean? Is “naturally occurring” the same as “natural”?  Does it describe how a supplement is made, or does it tell you something about where a particular nutrient comes from?

In this blog, we’ll take a closer look at what naturally occurring nutrients are, how they differ from nutrients that are specifically added to a product, what you can look for on a Supplement Facts panel, and how Green Pasture Products uses the term “naturally occurring” on our own labels.

Our goal is simple: to help you better understand supplement labels and where nutrients come from, so you can make informed decisions about the products you choose for yourself and your family.

What Are Naturally Occurring Nutrients?

In simple terms, naturally occurring nutrients are nutrients that are already present in a source ingredient rather than being separately added to a product. For example, an orange naturally contains vitamin C. The vitamin C is naturally present in the fruit; it isn’t added later.

Whole-food supplements begin with whole-food ingredients or food-derived ingredients that naturally contain a range of nutrients. This is one of the reasons many people are seeking whole-food supplements.

For example, FDA labeling guidance recognizes a distinction between vitamin C that is added to a supplement and vitamin C that occurs naturally in an ingredient. This is one example of how naturally occurring nutrients and added nutrients may be considered differently under supplement labeling requirements.

Some supplements include vitamins that are added during production to create or restore a specific nutrient profile. At Green Pasture, we use a traditional fermentation process and do not add synthetic vitamins into our cod liver oil products.

The term “naturally occurring” may not always appear on a supplement label. At Green Pasture, we use this language to describe nutrients that come naturally from the ingredients in our products rather than being added separately. When looking at other supplements, the ingredient list and Supplement Facts panel can help provide more context about where a product’s nutrients come from.

What Are Specifically Added Nutrients?

For purposes of understanding labels, specifically added nutrients are nutrients that are added to a supplement separately rather than being naturally present in the original food or source ingredient.

For example, vitamin C may appear on a supplement label as “Vitamin C (ascorbic acid).” FDA labeling guidance distinguishes between vitamin C that is naturally present in a source ingredient and vitamin C that is added separately, such as ascorbic acid.

So, the main difference is:

Naturally occurring = the nutrient is already present within the source ingredient.

Specifically added = the nutrient is added to the product separately from the source ingredient.

You may not see either term written exactly this way on every label. However, the ingredient list and Supplement Facts panel can provide helpful information about whether a nutrient is present naturally in a source ingredient or has been added separately.

Why Can Naturally Occurring Nutrient Levels Vary?

Because naturally occurring nutrients come from whole-food sources, some natural variation in nutrient levels is expected. Two oranges will not necessarily contain the exact same amount of vitamin C. In the same way, nutrients found naturally in fish and dairy can vary.

Green Pasture's Fermented Cod Liver Oil provides a helpful example. Our blog on Fat Soluble Vitamins explains that the naturally occurring vitamin content of fish oils can vary based on factors such as fish species, age, size, geographic location, and season. For that reason, naturally occurring vitamin levels are often better understood as ranges rather than identical amounts from every biological source.

Naturally Occurring Nutrients at Green Pasture

At Green Pasture Products, our focus on naturally occurring nutrients is part of our approach to making traditional food-based products. Our cod liver oil products are made from cod livers that are fermented without adding synthetics. The naturally occurring nutrients found in the source ingredients are part of the finished product.

Because these nutrients come from biological sources, their levels can naturally vary from batch to batch. We make our products in small batches and use third-party testing at multiple stages of production to help us understand what is present in the finished product and monitor natural variation.

Testing is an important part of how we ensure food safety and quality while monitoring that natural variation. At the same time, the ingredients themselves and how a product is formulated help tell the story of where its nutrients come from. When we use the term “naturally occurring” on our labels, our goal is to make that connection a little clearer and help customers better understand the nutrients naturally present in the ingredients we use.

Which Nutrients Are Naturally Occurring in Green Pasture Products?

When we use the phrase “naturally occurring”, we’re helping show where the vitamins and nutrients in our products come from.  While the exact nutrient profile of a natural product can vary, here is a simple breakdown of some of the naturally occurring nutrients found in our core products.

Things to Keep in Mind When Reading a Supplement Label

A supplement label can tell you much more than just how many milligrams or micrograms of a nutrient are in a serving. Here are a few helpful things to keep in mind:

• Start with the source. Look for whole-food ingredients or food-derived ingredients that help show where the nutrients in the product are coming from.
• Notice how individual nutrients are listed. Are nutrients shown as part of a whole-food ingredient, or are individual nutrient forms listed separately?
• Review the Supplement Facts panel. Serving size, amount per serving, and % Daily Value can all provide useful context.
• Read the full ingredient list. This helps give you a more complete picture of what goes into the product.
• Look for additional information from the manufacturer. Sourcing, processing, testing, and product FAQs can help answer questions that may not fit on the label itself.

A Final Thought on Naturally Occurring Nutrients

The next time you pick up a supplement bottle, start reading the label with this one simple question in mind: Where are these nutrients coming from?  

For those who prefer whole-food based supplements, understanding the source of the nutrients can be an important part of reading the label with more confidence. The ingredient list, Supplement Facts panel, and information provided by the manufacturer can all offer helpful context about what is in a product and where its nutrients come from.

At Green Pasture, we use the term “naturally occurring” on our labels to help explain the source of certain nutrients in our products. We also share information about our ingredients, traditional preparation methods, and sourcing, and third-party testing to help families better understand our products.

Knowing where the nutrients in a supplement come from can help you become a more informed reader of supplement labels.