l carnitine endurance L-carnitine can boost your endurance... But give it time L-Carnitine with Apple Cider Vinegar

Lilly argued the Cmax reduction was of limited clinical relevance because AUC drives contraceptive efficacy

Yuen BH et al

Current areas of scientific investigation include cellular signaling coordination studies, inflammatory pathway modulation research, extracellular matrix organization analysis, peptidemetal interaction investigations, multi-peptide pathway convergence studies, and regulatory signaling network research

Cyanocobalamin is more commonly used in supplements and prescriptions due to its stability and lower cost

from there, its a protein

[PMID: 19936064] PubMed record related to this compound for laboratory literature review