SULTANA RING -- The gem of this square cushion-cut smoky quartz crown ring sits atop a sterling silver openwork ring with an engraved center band. Imported. Catalog exclusive. Whole sizes 5 to 9. Tapers 3/8 to 1/8"W.
According to a study, a glucose and caffeine combination can improve brain activity efficiency. Neural substrate for the combined effects of these 2 substances were identified making use of functional magnetic resonance imaging. The main study... #bilateralparietalcortex #brainactivity #caffeine