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EMilo If you're taking "lot's " of magnesium and salt you're likely needing extra potassium. B12/folate push a need for extra K+, but even w/o those, you're in a position of likely needing more. Heart palpitations are my main sign for needing more. You can start w/ a salt substitute if you need something immediately. Potassium gluconate is really versatile as a powder. Also comes in tablets, highest dose 99mg. K+ chloride is the form used in salt replacement.
