Environmental toxins, however, are harder to break down.

Their goal was to develop a fish that could detect pollution by selectively fluorescing in the presence of environmental toxins.

The fish are slow to mature, and therefore collect relatively high levels of environmental toxins.

Air and water pollutants, environmental toxins, conventional styling products and excessive amounts of sebum have the potential to build up on the scalp.

Environmental toxins and pathogens have also been implicated, such as, carbon monoxide poisoning or herpes encephalitis and infrequent developmental occurrences have been documented.