Eating more salt causes high blood pressure is well known, however// a new study reports that even inhaling salt can cause it.

A study published today in the Open Access journal Environmental Health for the first time has shown that breathing in large quantities of salt particles can have just the same effect on blood pressure as eating a salty diet. This can be an occupational health hazard for workers in salt factory. It is recommended that they wearing face masks and plastic eyeglasses to protect workers themselves

Researchers Kripa Haldiya and colleagues from the Desert Medicine Research Centre in Jodhpur, India, provides valuable new data that suggests this finding on hypertension.

"This is a new observation, though it is in line with the hypothesis that, after being inhaled, salt may be absorbed from respiratory tract or the gastrointestinal tract. Consequent increases in plasma sodium may be responsible for increases in the blood pressure", explain Kripa Haldiya.

It is known that high consumption of salt can make a person prone to develop high blood pressure and the consequent development of heart and kidney diseases, which are major causes of mortality worldwide.

Kripa Haldiya et al. measured the blood pressure of workers in two salt milling factories in Rajasthan, India. They looked at two groups of workers. One group worked close to the salt milling plant and was directly involved in crushing, grinding, milling and packing salt; the other group worked far away from the salt milling plant and was much less exposed to salt particles.

The results of the study showed that the first group of workers had a mean systolic blood pressure of 122.1 mmHg, and this was significantly higher than the mean systolic blood pressure of 118.8 mmHg measured in the second group. In addition, workers from the first group had an incidence of hypertension of 12.2%, compared with an incidence of 7.0% in the second g
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