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Br J Clin Pharmacol 2025 demonstrates that co-infusing a GLP-1 agonist with glucagon produces a perfectly additive HR response (+4 bpm + +4 bpm = +7 bpm at 60 min in n=12 lean males), confirming that glucagon drives chronotropy via a parallel pathway independent of GLP-1R cross-reactivity

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A 5mg vial is perfect for short-term pilot studies, small-scale in vitro assays, or localized tissue samples

Research on supplement contamination reveals concerning patterns relevant to peptide sourcing

24 My own group is pursuing a core shell structure with a peptide in a core with L-arginine and zinc, then overcoated with silica