Bill Gates funded research on carbon nanoparticles found in Coca Cola and Pepsi.
Research has identified fluorescent carbon nanoparticles in Coca Cola and Pepsi that are able to cross the blood brain barrier.
The results come as the Gates Foundation began investing in PepsiCo and the world's largest beverage maker, Coca-Cola, a stake now worth $660 million.
The width of the nanoparticles is about 5 nanometers, they are composed of carbon, hydrogen and oxygen, and have structural characteristics typical of graphite.