Can peptides worsen restless leg syndrome or movement disorders?

There's no established link between peptides and movement disorders. However, if you have Parkinson's disease or restless leg syndrome, nootropic peptides affecting dopamine should be used cautiously. Discuss with your neurologist. <a href='https://www.ninds.nih.gov/health-information/disorders/restless-legs-syndrome' target='_blank'>NINDS Restless Legs Syndrome</a>