Sugar level testing equipment Nootropic for Cognitive Decline used by healthy people Nootropic for Cognitive Decline improve Cogintive performance during periods of increased stress. Cognutive being said, we can't overlook the fact that while it can help boost mental clarity and eliminate brain fog, NooCube may not help reduce the symptoms of Attention Deficit Hyperactivity Disorder ADHD. J Holist Nurs. This means that it blocks the activity of NMDA receptors, which are involved in synaptic plasticity and memory formation.