<img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=799546403794687&amp;ev=PageView&amp;noscript=1">

Producing adequate amounts of the foam for humans and ensuring it meets the Food and Drug Administration’s safety standards will take some more work, said Joseph Onyiah, an assistant professor of gastroenterology at the University of Colorado School of Medicine who was not involved with the study.