Alzheimer's disease (AD) is a progressive brain disorder and a leading cause of dementia worldwide. Despite years of research, there is still no cure. New antibody-based treatments that target amyloid β (Aβ) have recently emerged, but their benefits have been modest. These therapies can also be expensive and may trigger immune-related side effects, underscoring the urgent need for safer, more affordable options that can slow the disease.

A recent study published in Neurochemistry International offers a surprising possibility. Researchers from Kindai University and partner institutions found that arginine, a naturally occurring amino acid, can reduce the buildup of harmful Aβ proteins in animal models of Alzheimer's.…