Reviewed by PeptideGuide Research Team|Last updated February 15, 2026
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Met-Enkephalin vs Leu-Enkephalin
Complete side-by-side comparison of Met-Enkephalin and Leu-Enkephalin.
Side-by-Side Comparison
Property
Met-Enkephalin
Leu-Enkephalin
Name
Met-Enkephalin
Leu-Enkephalin
Peptide Class
Opioid peptide
Opioid peptide
Category
Pain and Opioid
Pain and Opioid
Dosage Range
N/A
N/A
Half-Life
Minutes
Minutes
FDA Status
Not Approved
Not Approved
Safety Rating
Research Only
Research Only
Cost Estimate
N/A
N/A
Met-Enkephalin
Met-Enkephalin is a pentapeptide involved in modulating pain perception through its action on opioid receptors. It is primarily used in research setti...
View full profile →Leu-Enkephalin
Leu-Enkephalin, a pentapeptide with the sequence Tyr-Gly-Gly-Phe-Leu, is an endogenous opioid peptide primarily involved in pain modulation. It functi...
View full profile →