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Absorcin oral disminuida por: neomicina oral, colchicina, c

This is a commonly referenced study from 1963 claiming a half-life of 5-6 days: nature.com/articles/198200a0 Although I would not cite it as an authority, the six-day half-life has also made it onto the B12 page in Wikipedia, seemingly unchallenged

Dog owners are more likely to meet physical activity guidelines than people without a dog: An investigation of the association between dog ownership and physical activity levels in a UK community

The compound is a synthetic pentadecapeptide originally identified through analysis of naturally occurring gastric peptides