Some will no doubt take the news with a pinch of salt.
But researchers claim that salt is addictive in the same way as cigarettes or hard drugs, with the craving triggering the same genes, brain cells and brain connections.
The finding could help explain why many find it so hard to cut back on salt, despite warnings about dangers to blood pressure and heart health.
For the study, Australian and American scientists kept some mice on low-salt diets and gave others a salt drip.
Activity in the creatures' brains was then compared with that in mice fed normally. They also studied the brains of mice that had been starved of salt for three days and then given salty water to drink freely.
When the rodents were in need of salt, brain cells made proteins more usually linked to addiction to substances such as heroin, cocaine and nicotine.