DMAE causes birth defects.
DMAE is not metabolized into choline in the brain.
DMAE inhibits choline kinase.
DMAE inhibits choline transport.
DMAE inhibits transport and metabolism of choline into Phosphocholine, Phosphatidylcholine, and Sphingomyelin. The transporter that is inhibited is talked of more in this article.
Phosphatidylcholine and Sphingomyelin are used to make membranes and myelin in your cells and nerve sheathes. This is a very important process that if inhibited for a long period of time can cause unwanted aging and neurodegeneration.
DMAE is one step away from becoming betaine and also creates more betaine by raising choline levels (via inhibiting choline transport and metabolism, read above). Choline dehydrogenase turns DMAE into DMG and choline into TMG. This is the stimulating effect from DMAE. For more information on the methylation cycle, use this image.
The cure to your nootropic stack is with addition of Phosphatidylcholine when you MUST use DMAE. You may also use a combo of CDP-Choline, Uridine, and Fish Oil, which will help because CDP-Choline is created after the use of choline kinase.
Still, it would be better to supplement with straight TMG if you just want the stimulating effects. There are many other cholinergics that are not nearly as degenerative. For instance, CDP Choline or Alpha-GPC or even soy lecithin if you want to go oldschool.
Inhibition of choline transport and metabolism appears to be competitive.
Edited by devinthayer, 07 October 2011 - 09:05 PM.