Yes, L-Dopa does increase GH release, but unfortunately no better than simple exercise. Also, it can cause nausea, increased blood pressure, and possibly uncontrollable muscle twitches (tardive dyskinesias).
Wasn't L-Dopa the "miracle drug" they gave to Alzheimer patients
back in the 70's? Don't know much about it, but I don't think I would
wanna fuck with that.