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Lucas is exactly right, and that lack of gelling is the biggest difference for us in the lab.
If you try to mix regular collagen or gelatin into a cold beverage, you get a clumpy, gelatinous mess. Collagen peptides, however, are completely water-soluble. They dissolve instantly in cold water, hot coffee, or acidic juices, and they leave absolutely no texture behind. If you are formulating a ready-to-drink (RTD) beverage or a stir-in powder, peptides are the only option you should be looking at.
1. You start with Native Collagen (raw hides, bones, scales).
2. You apply heat and water (partial hydrolysis) to get Gelatin. Gelatin is great for making gummy bears or capsules because it forms a thick gel when it cools.
3. You apply specific enzymes (full hydrolysis) to that gelatin, and you finally get Collagen Peptides. Peptides will never gel up, no matter how cold the liquid gets.
The fundamental difference comes down to size and structure.
Regular native collagen is a massive, tough, triple-helix molecule with a molecular weight of around 300,000 Daltons. Because it’s so huge, your body cannot absorb it effectively.
Collagen peptides (also known as hydrolyzed collagen) have been broken down through a process called enzymatic hydrolysis. This snips the massive triple-helix into tiny, short chains of amino acids weighing between 2,000 and 5,000 Daltons. Because of this extremely low molecular weight, peptides have near-perfect bioavailability and can easily enter the bloodstream.