In 2009, researchers looked at curcumin's antioxidant properties in mice, particularly its ability to ward off oxidative stress and protect the brain. They found that it was indeed effective at preventing cognitive deficits. The same year, another study investigated the ability of curcuminoids to enhance memory, as well as their ability to inhibit the activity of the enzyme acetylcholinesterase (which is the major function of many of the Alzheimer's drugs on the market today). Their findings showed that the curcuminoids did in fact inhibit acetylcholinesterase and improve memory. The authors of both studies concluded that curcuminoids seem like promising treatment options.