Moreover, PQQ may help reduce oxidative stress in the brain. Oxidative stress occurs when there is an imbalance between free radicals and antioxidants in the body, leading to cellular damage. This is particularly detrimental to brain cells, potentially impairing cognitive function and memory. By acting as a potent antioxidant, PQQ can help protect neural cells from oxidative damage, thereby maintaining their integrity and function, which is essential for optimal memory performance.