It's terrible
Cognitive cosmetic benefits, sometimes called "neurological aesthetics" in longevity medicine circles, include mental sharpness, reduced stress reactivity, and improved sleep quality, all of which affect visible signs of aging
The benzyl alcohol inhibits microbial growth, which is what allows the vial to be presented as a multiple-dose container and accessed repeatedly over a defined in-use period rather than discarded after a single entry
Skin penetration represents the primary challenge
If you plan to stay at 2.5 mg for longer than 4 weeks, consider a 10 mg vial instead to avoid waste
When a trial is warranted, we use a methylation-aware approach: start low and titrate, define stop/go criteria, and monitor sleep and behavior