It's Time to Stabilize Fats and Oils in Feed

The preservation of fat quality in feed is incredibly important. If you ask feed mill managers and nutritionists about their main concerns regarding fat and oil stabilization, most will say quality, variability and value. In the past, feed formulations used soy oil and single-origin animal fats in animal feeds and the quality of these sources kept nutrient variability very low. But when animal/vegetable blends, restaurant grease and by-product oils entered the market, fat and oil variability began to increase. This diverse variety of lipids, including animal fats, vegetable oils, blended fats and recovered vegetable oils, vary in their physical and chemical properties. These variabilities complicate the formulation of feed rations because it is hard to evaluate how much oxidation is affecting the digestible energy available, resulting in poor animal performance. 

The Lipid Evaluation Test

To better assess the quality of the fats and oils found in feed, Kemin offers a testing service for their consumers. Kemin Customer Laboratory Services (CLS) provides animal nutritionists with an accurate assessment of the quality of their fats or oils by confirming the oxidative status and the oxidative potential of their lipid source. Knowing these two key factors provides an understanding of the rancidity and overall quality of the lipid source and the finished feed product. In order to improve feed quality and avoid unwanted variations of fats and oils in animal nutrition, testing the lipid source is essential. Kemin CLS helps customers determine what action is needed to stabilize fats and oils in their feed. Stabilization of added lipid sources helps retain the energy concentration of expensive ingredients to increase profitability.

Kemin Solutions for Preservation of Fat Quality in Feed

Kemin continues to create products to help producers maintain feed nutritional value. With over 50 years of research and development experience in the animal feed industry, our Kemin-developed antioxidant systems provide a more efficacious stability solution for various types of fats and oils over other single-component antioxidants. To meet the quality demands of specific feeds and feed ingredients, Kemin combined specific blends of antioxidants and chelators (to control free radical formation) to create solutions like our RENDOX®, ENDOX® and NATUROX® product lines.

Benefits of using quality fats and oils:

  • Retention of nutritional values
  • Maintain livestock and poultry performance
  • Longer shelf life for feed due to decreased rancidity
  • Better palatability of feed


When attempting to stabilize fats and oils in feed, identifying the correct antioxidant for the fat or oil can be the difference between success and failure. To provide maximum protection from oxidation, Kemin offers an entire line of liquid antioxidants under the brand name RENDOX. RENDOX antioxidants are formulated specifically for treating commonly used rendered fats and oils. This product line helps feed maintain their freshness and quality. It can also increase product shelf life and animal performance. 

A number of synthetic antioxidants are used to provide oxidative stability to fats and oils, these include tertiary butyl hydroquinone (TBHQ), butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT) and propyl gallate. These antioxidants are capable of effectively controlling the autoxidative process, but Kemin scientists also recognize that these antioxidants react differently depending on the fat type being stabilized. The RENDOX product line is the result of Kemin scientists formulating blended antioxidant systems into a range of products for nearly every type of fat or oil used in modern feed production.


Antioxidant activity is a "contact sport." In order to control oxidation, it is essential to ensure a homogenous distribution of antioxidant activity in the feed matrix. Conventional antioxidants are often simple, dry mixtures containing crystals of the antioxidants and carriers. ENDOX uses a proprietary manufacturing process to apply active antioxidants to the surface of dry carriers. This allows nearly every particle to be covered with an active antioxidant mixture and allows for the proper distribution of the antioxidants in the animal feeds or feed ingredients.


The livestock and poultry production markets continue to evolve as the production of organic and all-natural meat continues to increase. Similar to conventionally raised livestock and poultry, feed cost continues to be the largest component of production costs for organic and all-natural production. When feeding an organic or all-natural feeding program, protecting the high cost of these ingredients is essential. Kemin offers a range of natural, tocopherol-based antioxidant products in both dry and liquid formulas to protect livestock and poultry feed and feed ingredients.

The Kemin Formula for Success

When you use RENDOX, ENDOX or NATUROX, you get more than great products. Partnering with Kemin means you receive the full expertise and support of the Kemin Technical Support Team, with application expertise as well as the freshness protection you expect. Your Kemin Technical Support Team includes:

  • A Key Account Manager and Technical Services Manager
  • Product Manager
  • Product Application Systems Experts
  • Customer Laboratory Services