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Identity, purity, and sterility screening on every production run, performed in ISO-certified independent laboratories
doi: 10.2337/db12-1327 224 ZhangQYZhangHYFengSGYaoMDDingJJLiXMet al
Common contaminants include bacterial endotoxins capable of triggering immune reactions, incomplete peptide chains from synthesis errors, residual solvents including trifluoroacetic acid, heavy metals, and microbial contamination from non-sterile handling
Metformin is far more likely to be covered without restriction
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