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Regulatory Peptides , 160 (1-3), 2632

That sounds like a real body of science until you look at who wrote it

These findings are from preclinical research and have not been confirmed in human clinical trials

Within the brain, DSIP is particularly abundant in the hypothalamus, hippocampus, and limbic regions, where it interacts with multiple peptide and non-peptide mediators, including corticotropin-like intermediate peptide (CLIP), adrenocorticotrophic hormone (ACTH), melanocyte-stimulating hormone (MSH), and melanin-concentrating hormone (MCH)

While there are a few options, the choice of solvent dramatically impacts the shelf-life and stability of your reconstituted peptide