“The cells of the retina use a lot of energy,” Anshel says. This compound, which is produced in the body, but at lower levels with age, keeps mitochondria healthier, so they can produce that power. It also may minimize lens-cell damage from light exposure.

Dose: 30 mg coQ10 daily, or 100–200 mg daily if you take statins, because cholesterol-lowering drugs tend to deplete coQ10 levels.