> "Supplementation of riboflavin and/or biotin is likely to be beneficial in a subset of Parkinson's disease patients, in which gut dysbiosis plays pivotal roles,"
From https://en.wikipedia.org/wiki/Riboflavin
> Best sources of riboflavin: Beef liver, Chicken liver, Whey protein powder, Almonds
> People at risk of having low riboflavin levels include alcoholics, vegetarian athletes, and practitioners of veganism.
From https://en.wikipedia.org/wiki/Biotin
> Best sources of biotin: Chicken liver, Beef liver, Eggs, Peanuts, Sunflower seeds, Pork chop
Offered without comment.