as a QA guy, I always look closely at the extraction facility, not just the animal source. The raw materials (hides, bones, scales) have to be thoroughly cleaned and demineralized before the enzymatic process begins. The enzymes used (usually food-grade proteases) dictate the final molecular weight (Daltons) of the peptides.
So, when you ask “where do they come from,” the answer is a combination of animal by-products and highly controlled, sterile bio-manufacturing facilities. That’s why picking a supplier with GMP and ISO certifications is non-negotiable for us.
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