Science
Phages unlock essential vitamin B12 by bursting open gut bacteria
Key Points
All living organisms need vitamin B12 to form red blood cells and DNA, as well as to build and support brain and nerve cells. But it's hard to come by: Humans don't make it. Animals don't make it.
All living organisms need vitamin B12 to form red blood cells and DNA, as well as to build and support brain and nerve cells. But it's hard to come by: Humans don't make it. Animals don't make it. Plants don't make it. In fact, this essential nutrient is made exclusively by certain bacteria and archaea.