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However, he added that since many of these experimental peptides dont have the same robust catalog of clinical trial data as FDA-approved medications, evaluating them for the 503A Bulks List may prove challenging for the committee and the agency

The biphasic response suggests possible mechanisms: lower doses (nanogram range) might work through growth factor upregulation and signaling cascade amplification, while higher doses (microgram range) might involve direct receptor activation or substrate provision for cellular repair

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