Eating more salt leads to more headaches, according to a study published in BMJ Open last December. In a multicentre feeding study with three 30-day periods, 390 participants were randomised to the DASH (a healthy diet that was expected to lower blood pressure) or control (regular, not very healthy) diet. On their assigned diet (DASH and regular), participants ate food with high sodium during one period, intermediate sodium during another period and low sodium during another period, in random order. The occurrence and severity of headache were recorded at the end of each feeding period. The researchers did not attempt to determine which type of headaches people were suffering from, but it is safe to assume that the majority suffered from tension-type and migraine headaches. The average age was 48 and 57% were women.
The occurrence of headaches was similar in DASH versus control, at high, intermediate and low sodium levels. By contrast, there was a lower risk of headache on the low, compared with high sodium level, both on the control and DASH diets. Obviously, there are many reasons to eat a healthy diet, but prevention of headaches is not one of them.
Interestingly, there was no correlation between elevated blood pressure and headaches.
The authors concluded that reduced sodium intake was associated with a significantly lower risk of headache, while dietary patterns had no effect on the risk of headaches in adults. This study showed that reducing dietary sodium intake offers a new approach to preventing headaches.
P.S. DASH stands for Dietary Approaches to Stop Hypertension, diet rich in fruits, vegetables and low-fat dairy products with reduced saturated and total fat.
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