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Nanoparticles may be more harmful than thought: Study

In a study published in the journal Nanotoxicology, scientists showed that 72 per cent of cells died after exposure to a cocktail of nano-silver and cadmium ions.

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Nanoparticles, which are found in thousands of everyday products due to their unique properties, can form toxic cocktails harmful to our cells, a study has found.

In a study published in the journal Nanotoxicology, scientists showed that 72 per cent of cells died after exposure to a cocktail of nano-silver and cadmium ions.

Nanoparticles are becoming increasingly widespread in our environment. For example, silver nanoparticles have an effective antibacterial effect and can be found in refrigerators, sports clothes, cosmetics, tooth brushes, and water filters.

There is a significant difference between how the cells react when exposed to nanosilver alone and when they are exposed to a cocktail of nanosilver and cadmium ions, which are naturally found everywhere around us on Earth, according to the researchers from University of Southern Denmark (SDU).

In the study, 72 per cent of the cells died, when exposed to both nanosilver and cadmiun ions. When exposed to nanosilver only, 25 per cent died. When exposed to cadmium ions only, 12 per cent diedm researchers said.

The study was conducted on human liver cancer cells.

The study indicates, that we need to take cocktail effects into account when trying to ascertain their effect on our health, said Frank Kjeldsen, a professor at SDU.

"Products with nano particles are being developed and manufactured every day, but in most countries there are no regulations, so there is no way of knowing what and how many nanoparticles are being released into the environment," said Kjeldsen.  

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