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What is measured in these rats and mice (and occasionally in small groups of human volunteers) is often not a hard endpoint like muscle strength or weight loss, but surrogate biomarkers: molecules in the blood that have an indirect link to a hard endpoint

FDA press announcement (2025) 11

Professional Medical Disclaimer: This article is educational and does not constitute medical advice

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However, due to poor metabolic stability of angiotensin IV and many AnglV analogues, the inability of early analogues to penetrate the blood brain baixier, and the failure to identify the AT4 receptor, no pharmaceutical company has moved forward with their development

Dosage Guidelines and Administration Standard dosing protocols for BPC-157 derive from animal studies using interspecies scaling factors