Experts say they've made a discovery that could lead to new therapies to treat Alzheimer's - and the starting point is cannabis.

(CNN) - Could medical marijuana treat Alzheimer's patients? One recent study found THC, the psychoactive ingredient in cannabis, stimulates the removal of toxic plaque in the brain, a common feature of the disease.

It's going to be pretty hard to keep weed illegal when your grandparents are smoking it to prevent Alzheimer's.

Salk Institute scientists have found preliminary evidence that tetrahydrocannabinol (THC) and other compounds found in marijuana can promote the cellular removal of amyloid beta, a toxic protein associated with Alzheimer's disease.