Simply put, a peptide is a short chain of amino acids

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The other part of carnitine deals with toxic compounds and waste, transporting them from the mitochondria to prevent the accumulation of unwanted substances
MK, MFH, MN, AD: Visualization, methodology
10.1016/j.intimp.2023.111274 134 TangM
Cerebrolysin Cerebrolysin is a peptide preparation derived from porcine brain proteins