Chris has been testing a mammalian neurohypophysial hormone, secreted by the posterior pituitary gland, that acts primarily as a neuromodulator in the brain, a.k.a. oxytocin. (Not to be confused with Oxycontin!)
Oxytocin is available in the form of a nasal spray to be taken twice a day.
Chris reports feeling quite “good” and his enthusiasm level does seemed to have perked up. Seeing an opening, I jokingly (but not really) suggested that he change his phone message, which right now sounds like his best friend just died. Why not record, “Hi, This is Chris! Leave a message!”