There's some emerging fields of science exoring how the voltage potentials effect the production of certain stem cells.

Biophotomodulation which uses wavelengths to increase atp production in cells and neurons.

Brainwave entrainment that stimulates certain brainwave patterns.

PEMF (pulsed electromagnetic therapy) that can stimulate activity in specific parts of the brain.

Transcranial AC stimulation that can induce currents along peripheral and cranial nerves to produce signals along specific structures in the brain.

Much more very interesting science coming out and being mastered in the next two decades. So I'm sure eventually we will be able to!