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It is a synthetic peptide derived from a protective protein found naturally in gastric juice
Substandard manufacturing can introduce truncated peptide sequences, heavy metals, or residual trifluoroacetic acid (TFA) salts, all of which ruin research data
Until more is known, don't substitute one form of carnitine for another
It functions as a powerful signaling peptide that declines significantly with age (from 200 ng/mL at age 20 to 80 ng/mL at age 60)
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