['Various studies suggest that deficiency of magnesium and potassium may be associated with increased risk of ischemic stroke. However, single time-point serum measurements may not be suitable for assessing long-term tissue levels.', 'We investigated Mg and K levels in hair of patients with acute ischemic stroke. The elements hair accumulation analysis might provide historical information on their concentrations over a longer period of time and probably reflects the corresponding nutritional condition. The concentrations of Mg and K in hair of 48 men with acute ischemic stroke and a control group were measured using spectroscopic methods.', 'The mean Mg and K concentrations in hair of patients were significantly higher than in the controls.'] Is high magnesium or potassium hair accumulation associated with ischemic stroke risk reduction : a pilot study?