The heart muscle, periodontal tissues, immune system, liver, kidney, brain, and other vital organs require coenzyme Q₁₀ to supply energy through ATP activation and to help protect them from free radicals. Illness, aging, poor nutrient intake, and use of certain medications can result in inadequate endogenous production of CoQ₁₀ to sustain optimal organ function. Each vegetarian capsule provides 100 mg of pure ubiquinone.