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12 Foods That Can Worsen Kidney Function

This article is for general information and is not a substitute for professional medical advice. Talk to a qualified health provider about your situation.

Comparison chart contrasting standard salt (NaCl) with salt substitutes (KCl) and highlighting elevated blood potassium risk.
Replacing sodium chloride with potassium chloride creates serious hazards when impaired kidneys cannot efficiently excrete surplus potassium.

5. Commercial Salt Substitutes

Many older adults turn to commercial salt substitutes to reduce their daily sodium intake. However, manufacturers routinely replace sodium chloride with concentrated potassium chloride to deliver a familiar salty flavor.

Impaired kidneys cannot efficiently excrete surplus potassium, causing blood levels to rise above safe thresholds. Serum potassium exceeding 5.0 mmol/L creates an immediate danger of life-threatening cardiac arrhythmias.

Season your food with citrus juices, garlic powder, onion flakes, or dried herbs rather than chemical substitutes.

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