Ketosis diet

HI, I was diagnosed with P.D. 3 years ago aged 54, i,ve always been very fit even though I,m over weight, the trouble is now I,m not so fit and am putting weight on. My daughter found suggestions that the KETOSIS DIET has good effects on P D symptoms, has anyone found this to be true?
there's some stuff on it on this thread

had negative effect on me but might work for others