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To understand how it’s made, you have to look at where it starts. From a sourcing perspective, collagen peptides are entirely dependent on animal co-products. The major sources are bovine (cattle), porcine (pigs), marine (fish), and avian (chicken).

For B2B buyers, how it’s made matters less than what it’s made from. For instance, bovine collagen usually comes from the split leather industry, while marine collagen uses fish skins from processing plants. If you are exporting this stuff, your buyers will want to know the exact origin, whether it’s grass-fed certified, or if it carries Halal/Kosher status right from the slaughterhouse level.