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Check the powder color (should be blue to blue-purple), look for a third-party COA, verify HPLC testing, ensure the packaging is amber glass, and buy only from suppliers that disclose concentration and batch numbers

J Clin Endocrinol Metab 77:13841387

A commenter requested that CMS rerun the cost modeling for the APCs excluding low volume or anomalous facility reports and consider volatility guards, public analysis regarding observed changes, and maintain payment levels that preserve beneficiary access until stable cost data can be established

Food and Drug Administration (FDA), or any other regulatory authority for human or animal use