I originally bought Coral Complete to try to make by body more alkaline. I am intolerant to dairy products so was also a little concerned about calcium deficiency.
I have now been taking it for 2 years (2 tablets at bed time). Within about 2 weeks I noticed that my nails are usually quite brittle and break quite easily had improved, and that there was definitely lot more hair growth and was in better condition.
After about a month I noticed less stomach disturbances (which I think was connected with yeast / candida imbalance as a result of my body being too acidic). I had already improved a bit from taking threelac and oxygen elements plus but it was at this point that I really improved.
Having tried other Coral calcium supplements, I can also say that this has been the easiest brand for me to tolerate as I am usually quite sensitive.