PQQ is pyrroloquinoline quinone. It is sometimes called methoxatin, pyrroloquinoline quinone disodium salt, and a longevity vitamin. It is a compound made by bacteria and is found in fruits and vegetables.

Antioxidant. PQQ is an antioxidant and based on research, it shows to be more powerful at fighting free radicals than vitamin C.  Antioxidants work better together, so it’s unclear if taking PQQ alone as a supplement can help stop any diseases.

Anti-diabetes. Problems with mitochondria are part of what causes diabetes. Lifestyle choices like exercise, food, stress, and sleep affect mitochondrial health. Animal data shows that PQQ supplements fix mitochondrial problems from diabetes and make diabetic mice respond better to insulin.

Inflammation. PQQ might lower inflammation by lowering the C-reactive protein, interleukin-6, and other markers in your blood.‌

Nootropic. Substances that help memory, attention, and learning are sometimes called nootropics. Studies show that PQQ raises blood flow to the cerebral cortex. This is the part of your brain that helps with attention, thinking, and memory. This supplement also may also memory problems in older people. 

Sleep and mood. PQQ might help with better and longer sleep. By easing fatigue, it might also help to improve moods.