Levadopa (L-dopa) is the most effective Parkinson’s disease treatment available. Carbidopa only added to L-dopa to stop nausea caused by using L-dopa the wrong way. Use of this combined drug leads to the progressive deterioration of the patient.
Carbidopa irreversibly binds to and permanently deactivates the active form of vitamin B6 where ever it is found in the body. With over 300 enzymes and proteins that require for normal function, there is no other vitamin or nutrient responsible for more vital chemical reactions.