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10.1007/s12016-017-8627-2 113 RichelleM.SabatierM.SteilingH.WilliamsonG

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When evaluating a supplier, consider whether they provide: Batch-specific Certificates of Analysis HPLC chromatograms showing purity LC-MS identity verification Clearly documented manufacturing standards Appropriate packaging and shipping procedures Responsive customer support Transparent product documentation Consistent batch quality While cost is one consideration, quality assurance and documentation are often equally important for laboratories that prioritize reproducible research

GAGs and proteoglycans act like the insulation and moisture barriers