Because the nasal mucosa (the lining inside the nose) is highly vascular, it can allow fairly steady absorption of certain peptides into circulation without the need for an injection
However, prolonged exercise (e.g., exceeding 45 min) may induce central fatigue, reduce frontal lobe activity, and increase neural noise, thereby impairing cognitive performance (Arne Dietrich and Audiffren, 2011
As a triple incretin receptor agonist, it: Activates GLP-1 receptors , reducing appetite, slowing gastric emptying, and improving insulin secretion Activates GIP receptors , enhancing insulin response and potentially supporting fat metabolism Activates glucagon receptors , increasing energy expenditure and hepatic glucose output Whilst glucagon receptor activation increases hepatic glucose output, the net glycaemic effect of retatrutide is mitigated by the concurrent GLP-1 and GIP activity, resulting in overall improvements in glycaemic control in trial participants
Solution: Always refrigerate reconstituted peptides (2-8C), protect from light, and never freeze after reconstitution
Evidence is promising but limited
