Are carbon nanotubes helping to cause cancer, cure cancer, both, or neither?  Several years ago, carbon nanotubes shot to mainstream consciousness in large part due to concerns that they may present health risks similar to asbestos fibers.  A 2010 study published in The Journal of Toxicology and Environmental Health found that carbon nanotubes can induce apoptosis, DNA damage, and initiate biological responses.  In 2010, and again in 2013, the National Institute for Occupational Safety and Health (NIOSH) issued a Current Intelligence Bulletin recommending exposure limits for carbon nanotubes and carbon nanofibers based on the concerns over possible adverse health effects.   A 2013 study, however, suggested that concerns about the similarities of bio-reactivity and pathogenicity between asbestos fibers and carbon nanotubes may be alleviated through modification of length and chemical modification of the nanotube surface.
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