Why C60 is for lab use only:

A verified study, stating no toxicity found by using C60, by Mike Takahash, Hina Kato, Mutsuko Hirata-Koizumi at the Division of Risk Assessment; National Institute of Health Sciences and many more now. [Research Paper].

The use of C60 still have not been recognized by the majority of the health organization and sole responsibility of using C60 products vivo, Latin for “within the living”; is yours and yours only.

Here is some more toxic studies on C60:

SciVere ScienceDirect and Elsvier.com article