The correct term is osteopenia, which is a medical term. Of determined by Bone Mineral densitometry exams. Osteopenia is slow from the bones because of age, slightly higher than the normal range. Loss of bone density. It is considered a factor somewhat manageable for the patient, since it can be controlled with diet and medications. Conversely, osteoporosis is the accelerated degradation, which is negative and can have consequences, ease in bone fractures.
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