Thanks, I'm a great believer in magnesium and have taken it in different forms since 1983. I also take Vit. D (2,000 IU) almost daily, sometimes instead of my softgels I just take a tablespoon of cod liver oil so I can get Vit. A too. But I think I neglected calcium in recent times because at one point it seemed to me I needed magnesium more than calcium. Balancing all the supplements I take gets a little difficult sometimes, especially now that I'm hypothyroid again.