American doctors, who tracked over 37 million people, said the injections put users at higher risk of nonarteritic ischemic anterior optic neuropathy (NAION).

Experts noted that rapid and extreme weight loss can introduce unique risks, such as a weakened immune system and malnourishment, as well as potentially too much muscle loss. They’re also concerned ...

Consumer Reports warns that there are important considerations, especially for older adults, before starting these treatments.