If at hand is osteoporosis running within your family( mother have it both siblings own it )wouldn't u enjoy it also?

The answer to this question is. Not necessarily.
Some things are genetic, and osteoporosis have a genetic influence, however, genes vary between siblings and parents. Therefore, since your mother have it and both siblings also have, this mode they express the "gene" that influences osteoporosis, while you, might be the lucky one and either dont enjoy the "gene" for osteoporosis, or you take contained by a lot of calcium, or the "gene" is in that but not expressed.