Scientists have suspected for some time that the link between our gut and brain plays a role in the onset of Parkinson's disease. Recent research adds further evidence to the link, identifying gut microbes likely to be involved and linking them with decreased riboflavin ( vitamin B2) and biotin (vitamin B7). The discovery suggests an unexpectedly simple treatment that may help : B vitamins . "Supplementation therapy targeting riboflavin and biotin holds promise as a potential therapeutic avenue