We doubt anyone’s poo smells of roses but it could be shining with gold.
US researchers have identified the precious metal in waste from American sewage treatment plants at levels which, if found in rock, could be worth mining.
The microscopic nuggets were observed using a scanning electron microscope.
Lead scientist Dr Kathleen Smith, from the US Geological Survey, said: ‘The gold we found was at the level of a minimal mineral deposit.’
She added: ‘There are metals everywhere – in your hair care products, detergents, even nanoparticles that are put in socks to prevent bad odours.’
The metals find their way into the body and end up being excreted and going down the toilet.
The US researchers were investigating ways of flushing out the valuable minerals, including gold, silver and rare elements such as palladium and vanadium.