When a calcium is non enough.

In a children also osteoporosis having, especially on calcium non enough,as in fractures, bad teeth, low hemoglobin, bruises as vessels fragility, hard stool, allergy, bleeding gums, fatigue, posture bad, spine does not support a muscle mass, calves in cramps, and risks are premature babies, with weak weight was born, rachitis, long sickening of arvd.
And calcium is good absorbs  in normal bowel microflora, stomach acidity, adequate mobility activity, full meal with calcium, sun visiting and getting vitamin d,as transfer a calcium from a bowel to blood.

And calcium does not enter in dis bacteriosis in antibiotics addicted, often using laxatives, stress, hypodynamic, smoking, avoiding from milk drinks, drinks just sweet gas..