It's ok
I didn't notice any difference after consuming 2 bottles. However, it got some really good ingredients such as lutein, zeaxanthin and astaxanthin, and has no magnesium stearate. I find Source Naturals, Zeaxanthin with Lutein is slightly better in improving my vision, but it has no astaxanthin and contains magnesium stearate. I will continue to take Dr. Mercola's Eye Support for maintenance purpose.