Cholesterol, oxysterols, and saturated FA have been implicated in PD pathogenesis, potentially affecting α-synuclein aggregation, dopaminergic neuron destruction, oxidative stress, and cytokine production (Liu et al., 2010; Bousquet et al., 2011; Fan et al., 2013; Doria et al., 2016; Erro et al., 2018). The gene discussed is SNCA; the disease is Parkinson disease.