I was taking 800 mg of calcium and had to stop as my Eye doctor noted that she could see the Calcium buildup in my eyes and was concerned not that it would hurt my eyes, but whether it could also be building up on my arteries. So, I am taking Calciven with K2, and once the AlgaeCal supplement arrives, I will ONLY take it. It's not cheap, but neither are our bodies, and we only have one body and one life. I want to make the best version of myself without harming the rest of me to live a healthier, happier, longer life ahead.