Supports optimal brain magnesium levels to promote cognitive function, learning ability and working memory. Animal research suggests that magnesium-l-threonate may promote synaptic plasticity and density in the regions of the hippocampus correlated with learning and memory. In a clinical trial of 44 participants aged 50-70, magnesium l-threonate (Magtein) provided significant support for cognitive processing speed, executive function, and overall cognitive ability after only 6 weeks. An in vitro study demonstrated that PhytoMemory, a blend of blueberry, strawberry and spinach extracts, maintained healthy activity of prolyl endopeptidase (PEP), a protein involved in learning and memory. Consumption of blueberries, strawberries and spinach has been associated with brain health in clinical studies.