Which Form?
Electrolytes
Moderate
consensus
Available Forms
- Electrolyte drinks or powders containing sodium, potassium, and magnesium for exercise and fasting
- Sodium-free salt substitutes (potassium chloride) for cooking if limiting sodium (Johnson)
- Whole food sources preferred for potassium: avocados, spinach, sweet potatoes, bananas
Dosage & Timing
Dosage
- Sodium: 1,600-3,200mg/day for healthy, active adults with normal blood pressure (Huberman)
- Reduce to <2,300mg if hypertensive (Attia)
- Potassium: 3,500-4,700mg/day primarily from food sources (Patrick, Hyman)
- Magnesium: 300-500mg/day supplemented (see Magnesium report for details)
Timing
- First thing in the morning with water for hydration (Huberman)
- During exercise per the Galpin equation
- During fasting periods to maintain electrolyte balance
- After sauna or heavy sweating (Johnson)
- Avoid large sodium intake without adequate water
Expert Positions
What Each Expert Says
Huberman has a dedicated 2-hour episode on salt and its role in mental and physical performance. He covers the neurobiology of sodium sensing through the OVLT, the kidney's role in fluid balance via vasopressin, the J-shaped curve of sodium health risks, and practical electrolyte supplementation protocols. Across multiple episodes, he emphasizes that hydration with electrolytes is essential for neuron function, recommends electrolytes during fasting, and provides the Galpin equation for exercise hydration. He also warns that salty-sweet food combinations can bypass homeostatic regulation and drive overconsumption.
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