Neuroprotective agents are substances that help protect nerve cells from damage or degeneration. They can be used to prevent or slow down conditions like Alzheimer's disease, Parkinson's disease, and other neurodegenerative disorders. These agents work by reducing inflammation, combating oxidative stress, and promoting cell survival. Common neuroprotective agents include certain vitamins, antioxidants, and medications. For example, N-acetylcysteine and curcumin are known for their potential neuroprotective effects. Research is ongoing to better understand how these agents can be effectively used in treating or preventing neurological diseases.