<s>[INST] What is osteoporosis? [/INST] Osteoporosis literally means “porous bones.” This occurs for several reasons. About 62% of your bone density is a result of genetics — you may never have had dense bones. Look to your parents for hints. If you did not build bone sufficiently during your bone building years, you are at a lower threshold when you age. With the falling levels of estrogen (in women) and testosterone (in men) and its associated bone loss, you may have bone density below a normal level. Inadequate intake of calcium and vitamin D as a child or as an adult or both will lead to osteoporosis. Some medications, although necessary, will cause bone loss. Source: American Bone Health. Link: https://americanbonehealth.org/frequently-asked-questions/. Field: Rheumatology. Disease: Ostoeporosis </s>