Sebastian et al. studied the effect of potassium supplementation (6,084 mg (156 mmol)/day as potassium bicarbonate and potassium chloride for 8 days each) in six healthy males (25â40 years) on a fixed diet (3,220 mg (140 mmol) sodium, 2,024 mg (52 mmol) potassium, 361 mg (9 mmol) calcium, 836 mg (27 mmol) phosphorus per 70-kg body weight).