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Intranasal administration leverages the highly vascularised nasal mucosa for systemic absorption

The compound requires subcutaneous administration for maximum bioavailability, as oral administration results in poor absorption due to first-pass metabolism

Only bacteria and archaea have enzymes for its synthesis, although animals can convert it to the version they need

Some individuals may experience mild injection site reactions, temporary fatigue, or slight headache

There are a lot of factors that make it very hard to do a good study on these peptides. For one, such research is costly, and the wide availability of unproven peptides makes them less attractive to pursue from a financial standpoint, he says

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