The cited half-life range comes from pharmacokinetic studies in animal models and is consistent with the general behavior of unmodified small peptides in blood
However, it is important that, besides looking at the potential benefits of each peptide, you consider potential interactions, side effects, and risk factors
Abbreviations APAP, acetaminophen
Although currently investigational, findings from these peptides may contribute to ongoing research in muscle degeneration, injury recovery, and hormone-mediated performance physiology
One study was even able to show an association between consumption of trans-palmitoleate (a fat found in milk) and lower fasting insulin levels
Several randomized controlled trials and meta-analyses report that oral or enteral glutamine can reduce markers of intestinal permeability in acute or short-term settings, such as following intense exercise or during critical illness