Answer:Both PQQ (pyrroloquinoline quinone) and CoQ10 (ubiquinone) are antioxidant compounds used by the body, but they differ in many ways and, unlike CoQ10, which has been extensively researched in well-controlled clinical studies, only a few, small and relatively short clinical studies have been conducted with PQQ. These studies have focused on the effects of PQQ on memory and cognition, cholesterol levels, energy and mood, athletic endurance, body composition and inflammation.
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