New research shows that the active ingredient in marijuana may prevent the progression of the disease by preserving levels of an important neurotransmitter that allows the brain to function.

Researchers found that marijuana’s active ingredient, THC, can prevent the neurotransmitter acetylcholine from breaking down more effectively than commercially marketed drugs. THC is also more effective at blocking clumps of protein that can inhibit memory and cognition in Alzheimer’s patients

[Read](http://www.msnbc.msn.com/id/15145917/ “Read the Story”) (Reuters via MSNBC)

Could this be Willie Nelson’s [defense](http://www.kxan.com/Global/story.asp?S=5433656&nav=menu73_4 “KXAN Article About Willie’s Most Recent Pot Bust”)?