The present invention relates to a pharmaceutical composition, comprising an Insulin-like growth factor I (IGF-I) protein as active pharmaceutical ingredient (API), a tonicity agent and a buffer. This composition may be administered as injection or infusion and is especially useful for the treatment, prevention and/or delay of progression of neurodegenerative disorders, in particular Alzheimer"s Disease (AD), a motor neuron disease (MND), in particular amyotrophic lateral sclerosis (ALS) or Spinal Muscular Atrophy (SMA) or a Muscular Dystrophy (MD), in particular Duchenne Muscular Dystrophy (DMD) or Myotonic Dystrophy (MMD).
