Side-by-Side Comparison · 2026

CRH vs TRH (Thyrotropin-Releasing Hormone)

CRH vs TRH (Thyrotropin-Releasing Hormone) — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

CRH
Hypothalamic Hormone

Corticotropin-releasing hormone (CRH, also CRF) is a 41-amino acid hypothalamic peptide first isolated by Vale et al. in 1981 after 40 years of searching....

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TRH (Thyrotropin-Releasing Hormone)
Hypothalamic Hormone

Thyrotropin-releasing hormone (TRH) is the smallest known hypothalamic releasing hormone, a modified tripeptide (pyroGlu-His-Pro-NH2) that stimulates TSH and prolactin release from the anterior pituitary. Despite its small size, TRH has extensive actions beyond the thyroid axis i...

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Key Parameters
Parameter CRH TRH (Thyrotropin-Releasing Hormone)
Category Hypothalamic Hormone Hypothalamic Hormone
Research Clinical FDA Approved (Diagnostic)
Half-Life 60-73 min (plasma) ~2-5 min (plasma)
Typical Dose 1 mcg/kg IV (CRH stimulation test) 200-500 ug IV (diagnostic)
Frequency Single diagnostic dose or research protocol Single dose (diagnostic)
Route Intravenous (diagnostic), Subcutaneous IV (diagnostic)
FDA Status Approved (Acthrel, diagnostic use) FDA approved (Thypinone for diagnostic use)

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Frequently Asked Questions
What is the difference between CRH and TRH (Thyrotropin-Releasing Hormone)?
CRH: Corticotropin-releasing hormone (CRH, also CRF) is a 41-amino acid hypothalamic peptide first isolated by Vale et al. in 1981 after 40 years of searching.... TRH (Thyrotropin-Releasing Hormone): Thyrotropin-releasing hormone (TRH) is the smallest known hypothalamic releasing hormone, a modified tripeptide (pyroGlu-His-Pro-NH2) that stimulates TSH and prolactin release from the anterior pituit...
Which has a longer half-life, CRH or TRH (Thyrotropin-Releasing Hormone)?
CRH half-life: 60-73 min (plasma). TRH (Thyrotropin-Releasing Hormone) half-life: ~2-5 min (plasma).
Can you stack CRH and TRH (Thyrotropin-Releasing Hormone)?
CRH and TRH (Thyrotropin-Releasing Hormone) 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.