In the samples from GBA1-PD patients with p.N370S mutation in the GBA1 gene, the measured parameter D90 (the diameter at which 90% of the sample’s mass comprises particles with a diameter less than this value) and the size mode of EVs were 162.7 ± 30.2 nm and 81.0 ± 6.2 nm, with the concentration ranging from 1.8 × 1013 to 2.8 × 1013 particles/mL, respectively. This evidence concerns the gene GBA1 and Parkinson disease.