Co-Q10 is found in energy-rich tissues like heart and helps promote mitochondrial health, cellular energy production, and healthy cardiovascular function. Ubiquinol, the active antioxidant form of Co-Q10 has been shown to be better absorbed. Jarrow Formulas Qh-absorb, featuring Ubiquinol, has been clinically shown to increase Co-Q10 levels by 222% (100 mg per day) and by 777% (300 mg per day) over baseline.