Potassium helps regulate blood pressure by counteracting the effects of sodium, promoting the excretion of sodium through urine, and relaxing blood vessel walls. While natural salts like Celtic or Himalayan salt do contain potassium, it's probably more effective to increase dietary intake of high-potassium foods such as such as avocados, apples, oranges and bananas. leafy greens. These foods provide potassium in much higher concentrations, which can help offset the effects of sodium more significantly.