Arent DMAE, Huperzine A, Lecithin, ALCAR, Centrophenoxine, Alpha-GPC, CDP-Choline
ALL affect Cholinergics?
I know Wikipedia isnt a great source but, It does have some good information?
Cholinergic nootropics include acetylcholine precursors and cofactors, and acetylcholinesterase inhibitors:
So...
DMAE: precursor
Lecithin: precursor
ALCAR: Precursor
Centrophenoxine: Drug/Precursor?
Alpha-GPC: precursor
CDP-Choline: precursor
Huperzine A: Is the only inhibitor?
Vitamin B5: Is the only cofactor?
So, my question is, why are people taking so many precursors? Is Choline that important? Or do each do a certain/different thing?
Im reading threads of people taking Centropheoxine, Alpha-GPC, DMAE and ALCAR?
Wouldnt that be considered overload?
DMAE is a choline precursor, but does not substantially increase synthesis of acetylcholine in the brain. Further, DMAE competes with choline for uptake into the brain, and may have some anticholinergic effects.
Lecithin is a delivery form of phosphatidylcholine, along with various other phospholipid conjugates, and has shown some effectiveness in hepatic disease and impairment characterized by high lipid level buildup in the liver. The neurological effects have not been well-researched, but conjecture exists that such supplementation could raise levels of PC in the brain, and thus increase acetylcholine levels.
ALCAR, aka acetylcarnitine, is not a precursor to choline, but rather is an acetylated form of the amino acid carnitine, which has some structural similarity to acetylcholine. Some research has suggested that ALCAR may mimic the effect of acetylcholine as an agonist in cholinergic neurons.
Alpha GPC aka Choline Alfoscerate is a substance derived from phospholipids, and research indicates that is serves as a precursor to acetylcholine, as well as other experimental cognitive neurological effects.
Huperzine A is an acetylcholine esterase inhibitor, i.e. it prolongs the effect of acetylcholine on cholinergic receptors, but does not raise the level of acetylcholine in pre-synaptic neurons.
Vitamin B5 is a cofactor, among others, in the formation of acetylcholine.