This is the part worth slowing down on
In particular, due to its amphiphilic characteristics, melatonin can diffuse and easily cross all morpho-physiological barriers, such as the placenta or the bloodbrain barrier 8,9 , and it can enter all cells of the body, influencing the function of a variety of tissues 10
doi:10.1176/appi.ajp.163.2.232CrossRefGoogle ScholarPubMed Post, RM, Altshuler, LL, Frye, MA, et al
As we age, we often lose this flexibility and become more reliant on glucose
Beyond these general permissive effects, dopamine (acting via D1 receptors) and norepinephrine (acting at several receptors) can, at optimal levels, enhance working memory and aspects of attention