Hello, I am 35 years old, female, and i have gastritis and osteoporosis. I have been prescribed calcium tablets for osteoporosis, Shelcal-M, but I am never sure how it is more efficient to take them, because different doctors gave me different opinions. My questions are: Is the calcium better absorbed by the body and bones if taken before meals or after the meals? And as I must take such tablets on a long term basis, how many do you recommend per day and for how long is it safe to take calcium tablets? Should make any gap between intake series? Many many thanks for your answer.