Porównanie prekursorów cholinergicznych: Alpha-GPC i Cytykolina w literaturze
Human plasma after oral citicoline carries uridine, not cytidine, which is the reverse of the rat. The two cholinergic precursors reach the same cycle by different chemistry.
The Racetams and Their Missing Mechanism: Fifty Years Without a Consensus
A 1994 review of 407 papers reported no accepted mechanism for the racetams. A 2010 review still called it an enigma, and the crystal structures published in between separated the class rather than unifying it.
Glycation and Advanced Glycation End Products
The chemistry that browns food also runs inside long-lived proteins. What differs is the instrument used to count it – and antibody assays and mass spectrometry do not report the same quantity.
Autophagy: The Recycling Pathway Behind Fasting Research
Ohsumi mapped the ATG genes because yeast lets you block digestion and look down a microscope. Human fasting research has neither move available, which is why the flux data are thin and contested.
The Evidence Base for Cognition Research Compounds: A Critical Guide
A molecule can be active in a cell-free assay, produce a clean result in mice, and show nothing in a randomised trial without any contradiction. This hub maps the evidence hierarchy and the failure modes at each level.