Is Graphene Toxic? What is Graphene?
Graphene is a thin layer of graphite that's only atoms thick. It has many uses, including in The Writer's Glove, where it's the "secret sauce." Graphene is made from the same non-toxic graphite that's in #2 pencils.
P.S. "Pencil lead" is actually graphite, not lead. That's good, because lead is toxic!
Source: https://www.thegraphenecouncil.org/blogpost/1501180/490084/Is-Graphene-Safe