Taste for salt tied to drug addiction
When the first slimy amphibians crawled onto dry land a few million years ago, they brought with them a powerful craving from that salty, primordial sea.
How powerful? It turns out that the genes and neural networks in the brain that regulate hunger for salt seem to be the same ones at play in drug addiction. And that could have some far-reaching implications — helping to explain why narcotics addiction is so hard to treat and maybe why people are so drawn to some pretty unhealthy foods, said an international team of scientists with local ties.