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They are not the same

These commenters stated that CPT 0893T involves exhaled gas analysis of oxygen, carbon dioxide, non-invasive blood oxygenation (PO2) and A-a gradient calculations and state that this procedure is comparable to CPT 94681 (oxygen uptake with exhaled gas analysis including carbon dioxide to assess lung function)

Elastin production stimulation by GHK-Cu represents a particularly significant finding given that elastin synthesis normally stops after puberty

While available for research use in places like the U.S., peptides are not officially approved for human use by regulatory agencies such as the FDA