Copied from a friend on Facebook:
I realized that I have something that older people need to know!
As one ages the ability to produce L Citrulline diminishes. It breaks down ammonia in the body. If it can’t be broken down, the body dumps it into the blood. The result is you start to forget things! It can get so bad that you don’t know where you are or who you are. I take 3000 mg / twice a day. If you need it you will notice a difference in three or four days and a large difference in 7-8 days. I have a large suspicion that at least some part of Alzheimer’s is just a lack of L Citrulline. If you try it and it helps, please let me know.
You can get it from www.iHerb.com or www.PureBulk.com