I'm 73, was Dxed as PD in 2011. Soon found Katzenschlager et al 2004 and Hinz et al 2011 (Amino acid management of Parkinson’s disease: a case study). Soon after PD Dx, I began using Mucuna pruriens and reduced my intake of generic Synemet. I've been taking 4 of 100/25 generic Synemet per day plus 1 ropinirole at bedtime plus Mucuna capsules with each 100/25. Hinz et 2016 has prompted me to reduce my 100/25 to 1/2 tab four times per day, while boosting my Mucuna. I still live alone, cook for myself, and drive my old Suburu (to local grocery, doctors, and library- all within 2 mile radius of home).