A phrase to describe a negative feedback loop could be: self-regulating (though I'm not sure the exact word you're looking for).
Answer:
"This medication will cure my child of this disorder."
Explanation:
Bisphosphonates are used in the palliative, not curative, treatment of osteogenesis imperfecta. The medication increases bone mineral density, therefore reducing the risk of the child developing fractures. The medication does not actually prevent fractures from happening.
Drugs and supplements are similar in that both have an effect on the nervous system and that both are psychoactive substances. They are different in that drugs are often necessary to help someone overcome an illness, while supplements are optional and not necessary.
