Complex sentence: Fava beans and velvet beans are natural sources of levodopa and are eaten by many people with PD; their intake is not free of risks as life-threatening adverse reactions have been described, such as the neuroleptic malignant syndrome.
Split into simpler sentences: Fava beans and velvet beans are natural sources of levodopa and are eaten by many people with PD. Life-threatening adverse reactions have been described, such as the neuroleptic malignant syndrome.