*  Tattoo: Toxic nanoparticles in inks may harm your immune system | The Siasat Daily
Most tattoo inks contain organic pigments, but also include preservatives and contaminants like nickel, chromium, manganese or ...
https://www.siasat.com/news/tattoo-toxic-nanoparticles-inks-may-harm-immune-system-1232740/
*  Kids with higher manganese levels may have lower IQ scores | The Siasat Daily
Kids with higher manganese levels may have lower IQ scores. September 23, 2017, 8:48 AM IST ... Washington: A recent study has found that children with higher levels of Manganese (Mn) in hair samples have lower IQ scores. ... Manganese is an element generally found in combination with iron and many minerals. ...
https://www.siasat.com/news/kids-higher-manganese-levels-may-lower-iq-scores-1235655/