Recently saw this research which raised my interest as my HWP suffered from REM sleep disorder, not severe, before going on to develop PD.
The ‘acting ‘out of dreams during sleep was not consistent, but it was happening before symptoms of PD appeared. Maybe a different diet may have helped.
It certainly is uppermost now in our lives when trying to keep to a ‘healthier’ diet’.
If the diet helps with that, maybe it helps in general?
I think so too. Maybe as LeharLover62 says could be the prevalence of Soya products, fermented soya is supposed to be healthy for the gut as well. Soya also helps with lowering cholesterol in some studies, and it could be it has more health benefits.
Interesting! I wonder if it’s really an ingredient in legumes or soy that is beneficial, or if it’s more the likelihood that people who eat more soy are also eating less meat? Also don’t they eat a lot of fermented soy in Korea?
That's a very interesting point. Or the fermentation itself may be it. They also eat kimchi that's fermented.
Especially when it comes to attention to vegetables, the MIND diet is recommended for PD. Although the fermented products are not explicitly mentioned, soy sauce, tamari and tofu are widely used in the recipes of the Creator Dr. Martha Clare Morris.
Diet for the MIND: The Latest Science on What to Eat to Prevent Alzheimer's and Cognitive Decline
I found two prior studies that might support the idea of soy as beneficial (though one is pretty sketchy)
pubmed.ncbi.nlm.nih.gov/347...
shefayekhatam.ir/article-1-...
Intrigingly this second one speaks about estrogen as protective to PD…don’t recall hearing much about that before!
OK but then his study shows no benefit to isoflavone supplements with AD patients.
ncbi.nlm.nih.gov/pmc/articl...
But theorizes that “the ability to effectively metabolize soy isoflavones by converting daidzen to equol ” in the gut may be the key to any benefits.
I am taking a break from Magnesium. You are welcome to change my mind. 
Newbie
The many symptoms of PD
REM Sleep Disorder
