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Animal data show subcutaneous and intragastric routes produce measurable effects, but nasal-route bioavailability for a 15-amino-acid peptide has not been quantified in peer-reviewed literature

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This study received an exemption from the Institutional Review Board of the Boston University School of Medicine, as it exclusively utilized postmortem tissue samples, which are not classified as human subjects under regulatory guidelines

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IGF-1 DES: Comparing the Two Major Truncated Analogues IGF-1 DES (des(1-3)-IGF-1) lacks the first three N-terminal amino acids of native IGF-1