Important safety additions may be lacking, researchers say

One expert questions the findings, and believes plasma-rich injections can help athletes and others

Irregular heartbeat that causes some attacks is often tough to detect, doctors say

Analysis of ancient fecal matter suggests more plants were eaten than previously thought

Lack of information and research often cited as reasons, study finds

In rare instances, reactions are potentially life-threatening, agency says

They were 60 percent more likely to develop disease, and to develop it earlier, researchers say

In rare instances, reactions are potentially life-threatening, agency says

They were 60 percent more likely to develop disease, and to develop it earlier, researchers say

Infected people who need new organ might have less need for immune-suppressing drugs, study finds