Less than 5 per mill of gold nanoparticles orally administered enter the body.


After oral uptake more than 99,5 % of the administered particles have been found within the feces, totally independent from the size of the particles, which have been applied [1]. Less than 0,5 % has been translocated into the circulation. The smallest particles (1,4 nm and 1,8 nm) distributed best within the body, and negatively charged particles more than positively ones.



  1. Schleh, C et al. (2012), Nanotoxicology, 6(1): 36-46.


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