Turmeric's medical properties have garnered a lot of interest in the scientific community in the past decade, with multiple studies looking into its reported benefits as a treatment for Alzheimer's. A study conducted in 2012 looked at the impact of adding turmeric to the diet of three patients suffering from severe Alzheimer's and dementia symptoms. All three showed notable improvements in their symptoms with no visible side-effects, and continued the treatment for a full year without showing any signs of relapse.
Other studies have centered specifically around curcumin and its close relatives (collectively known as curcuminoids), which are a key component of turmeric and are believed to be the source of its anti-inflammatory and antioxidant properties. 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.