potassium power to maintain good health consume foods rich in this mighty mineral by andrea downing peck costco connection potassium-rich foods and potassium supplements are available in the warehouses and at costco.com otassium stands in the shadow of more highly touted minerals such an important role in maintaining between muscles and nerves and is key to maintaining the body's fluid balance potassium can help blunt the effects retain fluid and increase blood pressure according to the american heart the more sodium you process out of the levels and low potassium levels are at increased risk for cardiovascular disease proteins at the expense of carbohydrates is among the experts who worry about the impact on overall health if only low-potassium vegetables and a rare fruit appear on dinner plates "to get carbohydrates low enough us to eat such small amounts of fruits because your body uses insulin to carb-restrictive keto diets have lower cause the kidneys to waste potassium since a keto diet causes potassium loss and meal plans often lack potassium- "getting hit two ways."