Scientists investigating Alzheimer’s have made a key finding—that the brains of individuals with Alzheimer’s produce the same amount of the protein beta amyloid as those with healthy brains.

This discovery contradicts recent assumptions that those with Alzheimer’s make more of the substance than others. It has energized other scientists, making them more optimistic about the possibility of developing drugs that address beta amyloid disposal, The New York Times reported.

Research will now focus more on how to prevent beta amyloid buildup from happening and finding ways to allow it to drain faster, according to researchers.