WHY GREEN PASTURE BLENDS FERMENTED COD LIVER OIL WITH CONCENTRATED BUTTER OIL

Published on July 2, 2026 / Green Pasture Products

Page Contents

Introduction

You may already be familiar with Green Pasture's Fermented Cod Liver Oil, including our traditional preparation method and the naturally occurring vitamins and fatty acids it contains. You may also know about our Concentrated Butter Oil, carefully produced from the butter of cows grazing on rapidly growing green grass during the peak of the growing season. 

While blending these two traditional foods may seem like a natural pairing, the inspiration behind our Fermented Cod Liver Oil and Concentrated Butter Oil Blends comes from the work of Dr. Weston A. Price and the observations he documented in Nutrition and Physical Degeneration. 

During his travels, Dr. Price studied the traditional diets of communities around the world and that many valued nutrient-dense animal foods. Among his writings, he described the use of cod liver oil together with "high-vitamin butter oil" as part of a traditional dietary approach. His observations inspired Green Pasture to offer a blend that brings together two time-honored foods using our traditional production methods. 

In this blog, we'll explore what makes Fermented Cod Liver Oil and Concentrated Butter Oil unique, why Dr. Price wrote about pairing these traditional foods, and how to choose the Green Pasture Blend that best fits your family's preferences.

Why Fermented Cod Liver Oil?

Fermented Cod Liver Oil has long been valued as a traditional food. The Weston A Price Foundation describes cod liver oil as a source of vitamins A and D, as well as long-chain omega 3 fatty acids. [1]  

• Vitamin A is a fat-soluble vitamin that supports normal vision, immune function, cellular communication, growth and development, and reproductive health.  [2]
• Vitamin D is a fat-soluble vitamin that helps the body absorb calcium and supports normal bone health.  [3]
• EPA and DHA are long-chain omega-3 fatty acids naturally found in fish and seafood. DHA contributes to normal brain function, while both EPA and DHA are important components of a balanced diet. [4]

By using a time-honored fermentation process to prepare cod livers, Green Pasture produces Fermented Cod Liver Oil containing naturally occurring nutrients and naturally present antioxidant compounds that have been studied in relation to oil stability.  [5]

Why Concentrated Butter Oil?

Dr. Weston A. Price placed special attention on butter from cows grazing on rapidly growing green grass. In Chapter 22 of Nutrition and Physical Degeneration, he described what he referred to as "high-vitamin butter oil" and discussed what he called the fat-soluble "activators" found in traditional diets. [6]  

Green Pasture produces Concentrated Butter Oil using a traditional, small-batch process. Cream is gently low-heat vat-pasteurized, cultured through traditional fermentation, and then the butter oil is concentrated through centrifugation, following the general methods described in Dr. Price’s writings. 

Our Concentrated Butter Oil contains naturally occurring compounds found in grass-fed dairy fat, including conjugated linoleic acid (CLA) and vitamin A. 

• Conjugated linoleic acid (CLA) is a naturally occurring polyunsaturated fatty acid found primarily in the meat and dairy products of ruminant animals, especially those raised on pasture. It has been the subject of ongoing nutrition research.  [7] [8]
• Vitamin A is a fat-soluble vitamin that supports normal vision, immune function, cellular communication, growth and development, and reproductive health. [2]

Why Blend Fermented Cod Liver Oil and Concentrated Butter Oil?

One of the reasons Green Pasture offers Fermented Cod Liver Oil and Concentrated Butter Oil Blends is because of the historical observations documented by Dr. Weston A. Price in Nutrition and Physical Degeneration. 

Throughout his writings, Dr. Price described cod liver oil and what he referred to as "high-vitamin butter oil" as complementary traditional foods that provided different fat-soluble nutrients. He wrote that cod liver oil supplied naturally occurring vitamins A and D, while high-vitamin butter oil supplied what he called "Activator X," a nutritional factor he observed in the butter of cows grazing on rapidly growing green grass. [9]

Dr. Price believed these foods complemented one another and wrote that combining "high-vitamin butter oil" with "high-vitamin cod liver oil" produced "a product that is more efficient than either alone." [9] This conclusion reflected his observations and experiences documented throughout his research. 

Throughout Nutrition and Physical Degeneration, Dr. Price documented observations from schools, families, medical and dental practices, and animal studies. His writings include observations related to dental development, growth, physical development, and traditional dietary patterns. These observations contributed to his belief that cod liver oil and "high-vitamin butter oil" were complementary foods when included as part of a nutrient-dense traditional diet.[6][10]  

These historical observations continue to inspire Green Pasture's Fermented Cod Liver Oil and Concentrated Butter Oil Blends, which bring together two traditionally prepared foods in a single product.

Historical Note: The references to Dr. Price's work in this article are provided to explain the historical inspiration behind Green Pasture's products. Dr. Price's observations were made in the early 20th century and should be understood in their historical context. They are not intended to demonstrate that Green Pasture products diagnose, treat, cure, or prevent any disease. 

Which Green Pasture Blend Is Right for You?

Green Pasture offers our Fermented Cod Liver Oil and Concentrated Butter Oil Blend in two forms: capsules and gels. Both combine the traditional pairing of Fermented Cod Liver Oil and Concentrated Butter Oil in a blend of approximately 2/3 Fermented Cod Liver Oil and 1/3 Concentrated Butter Oil. 

Blend Capsules

Our Blend Capsules are one of our most popular options. They offer Fermented Cod Liver Oil and Concentrated Butter Oil in a convenient capsule format that is easy to take and ideal for travel or daily routines. 

Many customers choose capsules for their simplicity, easy to store in the kitchen, pack for travel, or take with water as part of a daily routine. For those looking for a straightforward way to enjoy this traditional pairing, capsules are often a natural place to start. 

Unflavored Blend Gel

Our Unflavored Blend Gel offers the same Fermented Cod Liver Oil and Concentrated Butter Oil pairing in a “spoonable” form. This option is helpful for those who prefer not to take capsules or who prefer taking their oils directly.

The unflavored gel is the most traditional option and contains no added flavoring, offering the natural taste of the oils themselves. It can also be taken by the spoon or incorporated into foods.

Cinnamon Blend Gel

The Cinnamon Blend Gel adds a warm cinnamon flavor to the traditional blend. Many customers choose this option for its familiar taste profile, which helps mellow the natural flavor of the oils. 

It can be taken by spoon or mixed into foods such as oatmeal, pancakes, or warm beverages for added convenience. 

Chocolate Blend Gel

The Chocolate Blend Gel is a favorite for customers who want a richer, more decadent flavor. Like the Cinnamon Blend Gel, it offers a flavored alternative to the unflavored version while maintaining the same traditional oil blend. Many families appreciate having a flavored option that is easy to take by spoon or mix into foods.

Try our gels at room temperature, or place them in the refrigerator for a more solidified yet still “spoonable” experience.

Choosing the Green Pasture Blend That Fits Your Family

Green Pasture’s Fermented Cod Liver Oil and Concentrated Butter Oil Blends were created to honor the traditional pairing Dr. Weston A. Price wrote about, while offering options that fit a variety of preferences and lifestyles.

For those who prefer to customize their intake, both Fermented Cod Liver Oil and Concentrated Butter Oil are also available individually. This allows customers to choose their preferred format and use each oil on its own or together in whatever ratio works best for them.

If you are deciding which option is right for you, we encourage you to explore product reviews. Many customers share how they incorporate Green Pasture products into their routines, which formats or flavors they prefer, and their general experiences with the products.

Sources

[1] Weston A. Price Foundation - “Cod Liver Oil: The Number One Superfood”
http://westonaprice.org/health-topics/cod-liver-oil/cod-liver-oil-basics-and-recommendations/?

[2] NIH Office of Dietary Supplements - Vitamin A Fact Sheet for Health Professionals
https://ods.od.nih.gov/factsheets/VitaminA-HealthProfessional/?

[3] NIH Office of Dietary Supplements - Vitamin D Fact Sheet for Health Professionals
https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/?

[4] NIH Office of Dietary Supplements - Omega-3 Fatty Acids Fact Sheet for Health Professionals
https://pmc.ncbi.nlm.nih.gov/articles/PMC9641984/

[5] Green Pasture - “Fermentation: Enhancing Favourable Health Properties of Cod Liver Oils”
https://greenpasture.org/wp-content/uploads/2024/06/Fermentation-Grootveld.pdf

[6] Weston A. Price Foundation - Chapter 22 of Nutrition and Physical Degeneration on Fat-Soluble Vitamins
https://www.westonaprice.org/health-topics/chapter-22-of-nutrition-and-physical-degeneration-on-the-fat-soluble-vitamins/?

[7] Virginia Tech Extension - “Conjugated Linoleic Acid: A Fatty Acid With Health Benefits”
https://www.pubs.ext.vt.edu/content/dam/pubs_ext_vt_edu/HNFE/hnfe-1123/HNFE-1123.pdf

[8] McGuire & McGuire - “Conjugated Linoleic Acid: A Ruminant Fatty Acid with Beneficial Effects on Human Health”
https://www.researchgate.net/publication/228749916_Conjugated_linoleic_acid_CLA_A_ruminant_fatty_acid_with_beneficial_effects_on_human_health

[9] Journey to Forever - Nutrition and Physical Degeneration, Chapter 16
https://www.journeytoforever.org/farm_library/price/price16.html

[10] Journey to Forever - Nutrition and Physical Degeneration, Chapter 15
https://www.journeytoforever.org/farm_library/price/price15.html