Chemical structure of Coenzyme Q10 (CoQ10), an antioxidant studied for dementia prevention and brain health.

Hand-drawn molecular structure of Coenzyme Q10 (CoQ10) on graph paper with a red marker. CoQ10, also known as ubiquinone, supports mitochondrial energy and antioxidant defenses. Research suggests higher blood levels of CoQ10 may be linked to reduced risk of dementia and age-related cognitive decline.