Natural sources of collagen
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Animal-Based Natural Sources of Collagen
Collagen is most commonly sourced from animal tissues, especially from mammals such as cows (bovine), pigs (porcine), and chickens. These sources include skin, bones, tendons, and connective tissues, as well as by-products like leather production waste and even rabbit meat, skin, and ears. These animal-derived collagens are mainly type I, II, and III, which are the most abundant types in the animal kingdom and are widely used in food, supplements, cosmetics, and biomedical applications Martini2019Silvipriya2015Maistrenko2022+1 MORE.
Marine Collagen: Fish and Other Sea Creatures
Marine organisms have become increasingly popular as alternative and sustainable sources of collagen. Fish, especially their skins, bones, scales, fins, and cartilage, are rich in collagen, with fish by-products sometimes containing up to 61% collagen by dry weight. Other marine sources include jellyfish, starfish, sponges, mollusks, crustaceans, echinoderms, and poriferans. Marine collagen is mostly type I and is valued for its lower risk of disease transmission, absence of religious restrictions, and better biocompatibility. It is also easier for the human body to absorb due to its lower molecular weight Coppola2020Silva2014Felician2018+3 MORE.
Egg and Poultry Sources of Collagen
Collagen can also be found in egg whites and chicken skin. These sources are used in traditional diets and supplements, providing a natural way to consume collagen for joint and skin health .
Sustainability and Waste Utilization in Collagen Sourcing
There is a growing trend to extract collagen from underutilized or waste materials, such as fish by-catch, undersized fish, and leather production waste. This approach not only provides a valuable resource but also supports environmental sustainability by reducing waste and promoting a circular economy Coppola2020Prajaputra2023Maistrenko2022.
Conclusion
Natural sources of collagen include a wide range of animal and marine materials: bovine, porcine, and poultry tissues; fish skins, bones, and scales; jellyfish; mollusks; crustaceans; and even by-products from the leather and food industries. Marine sources are gaining attention for their sustainability, safety, and functional benefits, while traditional land animal sources remain widely used. The use of waste and by-products for collagen extraction further enhances the sustainability of this important protein resource Coppola2020Silva2014Felician2018+7 MORE.
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