The issued patent covers a method of using trehalose (SLS-005) to treat several neurodegenerative conditions including amyotrophic lateral sclerosis (ALS), Sanfilippo syndrome, oculopharyngeal muscular dystrophy (OPMD), Huntington's disease, spinocerebellar ataxia (SCA), spinal and bulbar muscular atrophy (SBMA), dentatomral-pailidoluyssan atrophy (DRPLA), Pick's disease, corticobasal degeneration (CBD), progressive supranuclear palsy (PSP), frontotemporal dementia, Parkinson's disease, parkinsonism linked to chromosome 17 (FTDP-17), Alzheimer's disease, and Friedreich ataxia (FA).