Nanoparticles and health

No.12616377 ViewReplyOriginalReport
Its all about Nano hBN (70nm).
Can someone help to estimate the safe amount for absorbtion into the body? Its used in lubes, cosmetics and many more but Im not sure if the LD50 for normal sized hBN is the same. hBN will slowly react with water and gets into the liver, so its unlike cancer caused by asbestos.
The amount we talk is around 15mg mixed into oil as a gun lubricant and realistic 1mg "could" enter the skin when absorbtion is 100%.
Right now gun lubes contain Nanoparticle Al2O3,hBN,WS2,MoS2... and I see no reason why small amounts should be 100% avoided. So much hate against Nano...uh you said Nano? Thats dangerous!