Loading...
Both animal and human studies show that N-methyl-D-aspartate receptor function is involved in learning and memory. Glycine binds to a modulatory site on the NMDA receptor complex and, by increasing its function, may improve memory and learning. This placebo-controlled, double-blind, manufacturer-supported study compared the effect on memory and attention of a single sublingual dose of 100 mg of an orally active form of glycine (Bioglycin) versus placebo in 30 medical students (mean age, 21; 15 females) and 18 middle-aged professional males (mean age, 59).
Participants were tested before and after administration of glycine and the placebo. At baseline, the older group showed poorer verbal episodic memory, as well as poorer focused, divided, a…