Would supplementing with a source of L-dopa such as mucus prurines off-set this process?  In my experience the answer would be no.  When my chronic pain became elevated my motivation and normal exuberance vanished.   No amounts of mucuna prurines and St. John's Wort alleviated the flatlined mental energy.  It has only somewhat returned as the weather warmed, but other pressures add to the overall stress.

The big question is how does one fix the problem and get back to living a productive life?  I am rapidly running out of time and resources.