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Marty Lemish

How many mEq is 99 mg of potassium?

David Byrden  Follow

No, 500 mg of potassium means 500 mg of elemental potassium. Usually both dietary recommendations and nutritional information are written with elemental potassium in mind.

Incidentally, the adult RDA for potassium is 4,700 milligrams per day (except for lactating women, who need more). One of the tablets you're talking about contains less than 2% of that. It's very hard to find a non-prescription supplement with more than 99 mg of potassium, because of FDA rules. That's part of why potassium-rich foods such as bananas (422 mg per banana), coconut water (roughly 600 mg per 8 oz. cup), and many others -- milk, nuts, potatoes, orange juice, etc. -- are so popular.

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Darla  Follow

99 mg of potassium or 99 mg/39.089 g/mol = 0.0025 mmol.

Since potassium is an univalent element, then 0.0025 mmol potassium equals to 0.0025 mEq of potassium.

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