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Head of the Oils and Fats Department at the Food Industries and Nutrition Research Institute, National Research Centre.
In the era of "smart industries" and the circular economy, the word "waste" has been removed from the lexicon of advanced production. The true value of a carcass is no longer measured solely by the meat and protein it provides, but by our skill in extracting its hidden treasures and reintroducing them into the economic bloodstream. At the heart of this strategic transformation, "chicken fat" emerges as an unexpected hero and a hidden golden asset.
This unique component has successfully defied the traditional view that long confined it to the category of "by-product" or a burden to be disposed of, now occupying a vast space of added value. Thanks to its distinctive chemical composition, chicken fat has transformed into a strategic raw material highly sought after by major industries; from enriching food production and enhancing feed efficiency, to powering green energy engines and entering the world of fine oleochemical industries.
We are witnessing a pioneering scientific and industrial logic that sees every drop of fat as a sustainable resource brimming with investment opportunities. So, what are the secrets of this hidden treasure? And how is this remarkable substance reshaping the landscape of industry and food in our contemporary world?
For a long time, chicken fat was considered a superfluous part of the main product, but modern industrial perspectives have rearranged the scene. With the advancement of rendering technologies, the potential to transform animal by-products into useful products, including fats and proteins, has emerged, reducing environmental impact and enhancing resource utilization efficiency. Therefore, chicken fat is no longer merely a component separated from the carcass, but a raw material that can enter multiple value chains if properly collected, processed, and directed.
Chicken fat is not deposited in a single location; rather, it is distributed among abdominal fat, skin-associated fat, and other deposits around the viscera and within tissues to varying degrees. This is not merely an anatomical detail but an important industrial consideration, as the deposition site affects the quantity of fat recovered, the nature of the raw material, the ease of separation, and its suitability for certain applications. Studies also indicate that the properties of chicken fat can be influenced by diet, farm, and production conditions, even when the animal source is similar.
The uniqueness of chicken fat lies in its fatty acid profile; it is typically dominated by fatty acids such as oleic, palmitic, and linoleic, with a higher proportion of unsaturated acids than those found in some traditional, more solid animal fats. The reference study used here indicates that the predominant acids in abdominal and gizzard chicken fat were oleic, followed by palmitic, and then linoleic, and that unsaturated acids constituted the largest portion of the fatty profile. However, scientific accuracy requires noting that this composition is not a fixed number but a range that varies depending on the source, diet, and production conditions.
The pivotal stage here is rendering, which is not merely heating to separate fat, but an industrial system that controls temperature, time, hygiene, separation efficiency, and the type of final pathway, whether food-grade or non-food-grade. American references indicate that rendering uses heat to convert animal materials into useful and safe products, producing fats and proteins that can be directed to food, feed, or other industrial applications depending on the raw material quality and processing route. The more controlled this process, the higher the quality of the fat and the broader its potential for higher-value applications.
Any fat can lose a significant portion of its value if its extraction, storage, or handling conditions are poor. The Codex Alimentarius code for the storage and transport of edible fats and oils clarifies that the primary degradation pathways include oxidation, hydrolysis, and contamination, and that the fat's susceptibility to these changes is influenced by its original nature, degree of purification, presence of impurities, and exposure to air, heat, and moisture. Hence, the importance of monitoring indicators such as peroxide value, free fatty acids, moisture, and impurities, in addition to carefully selecting storage containers and handling equipment.
After rendering and initial purification, chicken fat does not remain a single product in the narrow sense; rather, it can follow multiple pathways. It can become food-grade fat for specific applications, feed-grade fat incorporated into animal diets and pet foods, or a raw material for subsequent oleochemical processes. FOSFA defines oleochemicals as chemical substances derived from natural oils and fats, with fatty acids, glycerin, and methyl fatty acid esters being among their most important products. This means that industrially, chicken fat is not viewed as a single substance, but as a raw platform capable of branching into multiple products.
When chicken fat enters the world of oleochemicals, its economic value expands further. Fatty acids, glycerin, and methyl esters derived from natural oils and fats serve as intermediate materials used in industries such as soaps, detergents, surfactants, lubricants, and certain coatings. The major advantage of these pathways is that they originate from a renewable raw material, which enhances their appeal in the context of sustainability and the green economy compared to some petrochemical-based alternatives.
Its primary advantage is that it is a renewable raw material already present within the poultry production chain, allowing for the conversion of a by-product into added value without the need for a new independent raw material. It also possesses a degree of application flexibility due to its composition, enabling it to serve multiple sectors depending on quality and processing type. In feed applications, fats are a concentrated energy source, and the rendering industry in North America converts animal and poultry materials into components used in animal, poultry, aquaculture, and pet foods, in addition to other industrial uses.
Yes, and this perspective adds a human dimension to chicken fat that is no less important than its industrial one. In Ashkenazi Jewish cuisine, especially within kosher culinary traditions, schmaltz holds a well-known place as rendered chicken fat, and sometimes goose or duck fat. Jewish cultural sources explain that this fat gained special value because it was an important traditional substitute for butter in meat dishes, as butter is not used in cooking meat or chicken according to the rules of separating meat and dairy in Kashrut. Thus, schmaltz was not just a cooking fat, but part of a complete culinary memory that gave some traditional dishes sensory depth and a special flavor.
In pet food, fats are not only used to increase energy density but also for the improved palatability they provide. AAFCO references clarify that the minimum fat content in dog and cat food is based on recognizing fats as a source of essential fatty acids, a carrier for fat-soluble vitamins, and an ingredient that enhances palatability and provides appropriate caloric density. Thus, the presence of animal fats, including chicken fat, has become established in this sector as a functional ingredient, not merely a secondary additive.
Yes, and with an increasing role. Data from the U.S. Department of Agriculture indicates that animal fats, used oils, and greases constituted 37% of the total raw materials used in biomass-based biofuel production in 2023, compared to 17% in 2020. This shift reflects the growing importance of these raw materials from a cost and sustainability perspective, opening the door for chicken fat to be part of a broader system that utilizes animal by-products in the bioenergy sector.
Sound writing about chicken fat must avoid oversimplification. It is not an "ideal fat" simply because it has industrial value, nor is it a condemned substance merely because it is an animal fat. The more accurate truth is that it is an energy-dense fatty substance, and its nutritional evaluation remains part of the larger picture of the diet as a whole. The World Health Organization emphasizes that the composition of a healthy diet varies according to age, activity, cultural context, and dietary habits, and that the foundation is diversity, balance, and moderation, not issuing absolute judgments on a single component in isolation from the overall consumption pattern.
Because the circular economy doesn't start with inventing a new material as much as it starts with rediscovering the inherent value in existing materials. Chicken fat clearly embodies this meaning; it is a by-product that has moved from the periphery to the center of industrial attention, becoming capable of serving food, feed, energy, and oleochemical industries when properly extracted, controlled, and directed. Therefore, the true value lies not in the material alone, but in the scientific and industrial mindset that knows how to transform remnants into assets, and the marginal into opportunities.
If the goal is to move from awareness of value to effective investment, the path begins with three integrated circles:
In an era where industries are racing towards sustainability and maximizing efficiency, it is no longer acceptable to view by-products with a mindset of displacement and disposal, while they hold real economic and technical opportunities within them. Chicken fat offers a powerful lesson in this regard; it is not merely a fatty substance separated from the carcass, but a strategic resource that can serve food, feed, energy, and industry, provided there is precise knowledge, controlled processing, and a vision that sees inherent value, not an added burden, in surplus.
With this in mind, this hidden treasure sends its three messages:
