Sodium

Sodium is the mineral most people have heard the most warnings about, and those warnings aren’t entirely without basis — chronically high sodium intake is associated with elevated blood pressure in people who are sensitive to it, and high blood pressure is a significant cardiovascular risk factor. But the conversation around sodium in popular health culture tends to be reductive in a way that misses important context, and the anxiety it produces around salt in otherwise healthy people eating whole foods is largely disproportionate to the actual risk.

Sodium is essential. It’s the primary electrolyte outside of cells and is central to fluid balance, nerve signaling, and muscle contraction. The body regulates blood sodium levels tightly, and both too little and too much cause problems. Hyponatremia — dangerously low blood sodium — is a real clinical condition that produces serious neurological symptoms. The body needs sodium to function. The question is how much, and where it’s coming from.

The practical reality for most people is that excess sodium in modern diets comes almost entirely from processed and packaged foods, not from salting home-cooked meals. Restaurant food, canned goods, deli meats, bread, snack foods, and condiments are where the majority of dietary sodium accumulates — often invisibly, in foods that don’t even taste particularly salty. Someone eating a diet built around whole foods and cooking at home, seasoning with salt to taste, is in a very different position from someone whose diet relies heavily on processed food, even if both are adding salt at the table.

The more complete picture of sodium and cardiovascular health involves potassium. The ratio between sodium and potassium intake is more predictive of blood pressure outcomes than sodium alone. Increasing potassium intake from fruits, vegetables, and legumes while reducing processed food consumption addresses both sides of that ratio simultaneously — and is a more effective and sustainable approach than trying to eliminate salt from an otherwise whole food diet.

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Reference Card

Mineral type: Major mineral Pillar: Nourish

What it does for you

• Primary electrolyte outside of cells — regulates fluid balance and blood volume
• Essential for nerve signaling and muscle contraction
• Supports nutrient absorption in the small intestine

Where to get it

• Present in virtually all foods — concentrated in processed foods, canned goods, deli meats, bread, condiments, and restaurant food
• Added through table salt and cooking

Considerations

• The majority of excess sodium in modern diets comes from processed and packaged foods, not home cooking
• The sodium to potassium ratio matters more for blood pressure than sodium intake in isolation
• Sodium needs increase with exercise, heat, and heavy sweating — active people have higher sodium requirements than sedentary ones
• People with hypertension or kidney disease may need specific guidance on sodium intake — for otherwise healthy people eating whole foods, moderate salt use is not a meaningful concern

Signs your intake might be too high

• Elevated blood pressure over time
• Fluid retention and bloating
• Increased thirst

Signs your intake might be too low

• Muscle cramps during exercise
• Dizziness or lightheadedness
• Fatigue — particularly relevant for active people sweating heavily

Common myths

• All salt is bad — sodium is an essential mineral; the problem is excess from processed food, not moderate use of salt in home cooking
• Sea salt and Himalayan salt are healthier than table salt — all forms of salt are primarily sodium chloride; specialty salts contain trace minerals in amounts too small to be nutritionally meaningful, and unlike table salt they are not iodized
• Reducing salt intake is the most important dietary change for blood pressure — increasing potassium intake from whole foods is equally or more impactful than sodium reduction alone