Side-by-Side Comparison · 2026

Beta-Endorphin vs Endomorphin

Beta-Endorphin vs Endomorphin — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Beta-Endorphin
Endogenous Opioid

Beta-endorphin is a 31-amino acid endogenous opioid peptide cleaved from pro-opiomelanocortin (POMC) in the pituitary gland and hypothalamus. It is the most potent endogenous opioid, with approximately 18-33x the analgesic potency of morphine....

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Endomorphin
Endogenous Opioid

Endomorphin-1 (Tyr-Pro-Trp-Phe-NH2) and Endomorphin-2 (Tyr-Pro-Phe-Phe-NH2) are tetrapeptides discovered in 1997 by Zadina et al. as the most selective and potent endogenous agonists of the mu-opioid receptor (MOR)....

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Key Parameters
Parameter Beta-Endorphin Endomorphin
Category Endogenous Opioid Endogenous Opioid
Research Research Research
Half-Life 20-30 min (plasma) Seconds to minutes (rapidly degraded)
Typical Dose Not established for exogenous use 1-100 nmol/kg (animal)
Frequency Research variable Variable
Route Subcutaneous, Intravenous Intrathecal, Intracerebroventricular, Subcutaneous
FDA Status Not approved for therapeutic use Not approved

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Use ASCEND's free reconstitution calculator to get exact syringe draw amounts for your vial.

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Frequently Asked Questions
What is the difference between Beta-Endorphin and Endomorphin?
Beta-Endorphin: Beta-endorphin is a 31-amino acid endogenous opioid peptide cleaved from pro-opiomelanocortin (POMC) in the pituitary gland and hypothalamus. It is the most potent endogenous opioid, with approximatel... Endomorphin: Endomorphin-1 (Tyr-Pro-Trp-Phe-NH2) and Endomorphin-2 (Tyr-Pro-Phe-Phe-NH2) are tetrapeptides discovered in 1997 by Zadina et al. as the most selective and potent endogenous agonists of the mu-opioid ...
Which has a longer half-life, Beta-Endorphin or Endomorphin?
Beta-Endorphin half-life: 20-30 min (plasma). Endomorphin half-life: Seconds to minutes (rapidly degraded).
Can you stack Beta-Endorphin and Endomorphin?
Beta-Endorphin and Endomorphin are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.