Human test with wonder material, it's safe - Frontiers.com. 14 volunteers inhaled a particular form of graphene, without showing any short-term negative effects on health.
Study indicates that this nanomaterial could also be further developed in the medical field. Only a very slight influence on the way the blood clots was noted, but the researchers stress that this is a very small effect. However, further research will be needed to understand the effects of higher doses or other forms of thenanomaterial.