NetSurfer wrote:
<Please excuse my ignorance but what are the benefits of 
centrophenoxine or of DMAE?>
In case you're unable to do a Web search here are some summaries:
>From http://www.naturallife.com/DMAE.html
<DMAE  The memory stimulant ... Choline is the usual precursor of 
acetylcholine, but it does not cross the blood-brain barrier very 
well. The body makes acetylcholine from choline as it is needed. DMAE 
is basically a choline molecule with one methyl group missing from the 
nitrogen. DMAE is more able to cross the blood-brain barrier than 
choline. Once inside the brain, an enzyme performs a methylation that 
converts DMAE into choline. So, taking DMAE increases the brain's 
potential to make neurotransmitters.  Dean and Morgenthaler's book 
reports the following effects for DMAE: mood elevation, improvement of 
memory and learning, intelligence increases, and increases in the life 
span of laboratory animals.>
>From http://www.damicon.fi/sd/centrophenoxine.html
<Lipofuscin is the material centrophenoxine is said to remove or scour 
from the glial cells or neurons. It is the waste or residue of 
digestion by lysosomes of effete organelles and bacteria.... The data 
demonstrate that centrophenoxine-induced inhibition of lipofuscin 
accumulation has a positive influence on the cell metabolism and the 
mitotic division capacity and causes a delay of the cellular aging of 
the human glia cells in vitro. (Rodemann and Bayreuther, 1979) 
Concomitant with the reduction of the accumulated lipofuscin, 
centrophenoxine- treated glia cells show enhanced rates of RNA 
synthesis, protein synthesis and glucose uptake. Most likely the 
utilization of glucose is shifted from glycolysis to the pentose 
phosphate pathway. Data suggest reduction of lipofuscin by 
centrophenoxine has a positive effect on cell metabolic functions and 
causes a delay of the cellular aging of the human glia cells in vitro. 
(1983)>
As for what Morris Johnson was referring to (BTW, I didn't see any 
reference by Max More to centrophenoxine) when saying
<I was astonished at the similarity between the combination of DMAE 
plus the common herbicide 2,4-D and centrophenoxine.  The only 
difference is the 2, chloro of the 2,4-D.  Would people exposed to 
minimal amounts of 2,4-d while also consuming DMAE have similar 
effects to those of centrophenoxine?>
I haven't a clue - interaction of neurochemicals in the brain is an 
EXTREMELY complex subject.
Mark Crosby