The Dangers of a Low Salt Diet, By Mrs. Vera West and Mrs. (Dr) Abigail Knight (Florida)
The blog essay from VigilantFox (link below) is a repost/summary of an article by "A Midwestern Doctor" (originally on midwesterndoctor.substack.com). It argues that conventional low-salt dietary advice is misguided and potentially dangerous, claiming the body suffers significantly when sodium intake is too low.
Core claims in the essay:
Salt (sodium) is essential for health; extreme restriction disrupts blood's electrical stability (zeta potential), leading to particle clumping, poor circulation, reduced cardiac output, low blood pressure, rapid heart rate, and shock-like states.
Low sodium causes symptoms like fatigue, brain fog, difficulty concentrating, lightheadedness, falls (especially in elderly), confusion, and worsening of conditions such as chronic fatigue syndrome, POTS (postural orthostatic tachycardia syndrome), and orthostatic intolerance.
It links low intake to higher mortality (e.g., 25% increased risk), more cardiovascular events/deaths (34% rise), and hyponatremia (low blood sodium), which is common in hospitals (15-20% of admissions) and 9.9 times more likely in salt-restricted hypertensives. Certain meds (e.g., SSRIs) triple the risk.
The piece critiques guidelines as based on flawed linear models (assuming lower salt = always better), ignoring U-shaped risk curves where both very high and very low sodium increase harm, with moderate levels safest.
Recommendations favour natural, mineral-rich salts (e.g. sea salt) over refined table salt, suggesting people increase intake if they have low blood pressure or related issues, and listen to cravings rather than strict limits.
The article portrays low-salt policies as a 50-year mistake driven by weak evidence, with benefits of restriction minimal (<1% blood pressure drop) but risks structural.
Is this a real danger from low-salt diets? Yes, insufficient sodium can pose risks, particularly in certain scenarios, but high sodium is also a risk. With everything it is a question of balance.
Established risks of very low sodium (hyponatremia and related issues): Severe restriction (e.g., <1,500–2,000 mg/day sodium, especially with high water intake, certain meds, illness, or in elderly/athletes) can cause hyponatremia. Symptoms include nausea, headache, confusion, fatigue, muscle cramps, seizures, or (rarely) brain swelling/coma/death. It's more common in hospitals, older adults, or those on diuretics/SSRIs. Observational data links very low intake to higher mortality, insulin resistance, falls, and worsened heart failure in some groups. U-shaped curves appear in some studies: lowest risk around 3,000–4,000 mg/day sodium, higher at extremes.
But mainstream guidelines and evidence emphasise excess sodium as the bigger population-level threat: Organisations like WHO, AHA, Heart Foundation (Australia), and Australian Nutrient Reference Values recommend <2,000 mg sodium/day (~5 g salt, or 1 tsp) for adults to reduce high blood pressure, stroke, heart disease, and related deaths. Average Australian intake is ~9 g salt/day (far above), linked to hypertension risks. Reducing sodium lowers blood pressure (e.g., 5–6 mmHg systolic in trials), with benefits outweighing risks for most. No strong evidence shows deficiency in healthy people eating typical diets; hyponatremia is rare from diet alone without other factors (e.g., overhydration, medical conditions).
Expert like James DiNicolantonio (author of The Salt Fix, frequently cited in such pieces) argues most people benefit from 3,000–6,000 mg/day, especially on low-carb/keto diets (which increase sodium loss). His views challenge guidelines but face criticism for selective evidence; many reviews find moderate restriction safe and beneficial for blood pressure/CVD in general populations.
In Australia, follow Heart Foundation/Australian Dietary Guidelines: aim for ≤2,000 mg sodium/day via fresh foods, less processed items. If you have low blood pressure, POTS, heavy sweating (e.g., exercise), or symptoms like persistent fatigue/lightheadedness, consult a doctor or dietitian — individual needs vary (e.g., some need more salt). Extreme restriction without medical reason isn't advised, but blanket "eat more salt" ignores proven CVD risks from excess. If concerned about your intake, track via food logs or check with a GP for blood tests (electrolytes).
https://www.vigilantfox.com/p/what-happens-when-the-body-doesnt-fe4
