DIETARY CONSTITUENTS
There is, at present, no convincing evidence to link alterations in magnesium intake with blood pressure, and thus the JNC VI report did not advocate an increase in this mineral for the purpose of lowering blood pressure. Caffeine may raise blood pressure acutely in caffeine naive individuals but does not appear to be a factor in the chronic elevation of blood pressure. Moreover, there is no evidence that withdrawal of caffeine in habitual consumers produces a decrease in blood presssure. While some studies have suggested a beneficial effect of large amounts of omega-3 fatty acids in reducing blood pressure, intolerance of these doses makes this an impractical approach for most individuals.
