The truth about whether salt is good or bad depends on the individual. Some people need more, while others need less.
- The Salt Controversy
- How Much Salt Do We Consume
- Recommendations From The Health Establishment
- The Bad: Potential Problems With Too Much Salt
- Excess Salt May Worsen Inflammation
- Excess Salt May Raise Blood Pressure
- Excess Salt May Increase Your Calorie Intake
- Excess Salt May Cause Headaches
- Excess Salt May Cause Cognitive Decline
- Excess Salt May Cause Kidney Stones
- Excess Salt May Increase Bone Loss
- Excess Salt May Raise Your Risk for H. Pylori Infection
- Excess Salt May Raise Risk for Certain Cancers
- Excess Salt May Raise Your Risk for Cataracts
- Excess Salt May Worsen Sleep Apnea
- The Good: Potential Problems With Too Little Salt
- What To Do?
- Buy Healthy Salt
The Salt Controversy
A core problem with how we think is that we view all things as either good or bad. This thinking has lead me astray in the past.
Anytime there’s a controversy or a mix of opinions, you can bet that the good/bad paradigm is especially flawed.
People should realize that something can be good in one way and bad in another.
- It could be good for one person and bad for another.
- It could be good in one situation and bad in another.
The reason we think in these terms is because it causes us cognitive strain (or ‘dissonance’) to believe something we’re doing can be both harmful and helpful. We want the benefits, but we don’t want the harm.
Salt is one of those things that has no clear answers, but is dependent on the person and dose.
Just like with saturated fat and the controversies surrounding it, when we find out that salt isn’t as bad for us as we thought, it suddenly turns into a superfood and we start piling it on at each meal.
How Much Salt Do We Consume
Salt consists of sodium (40%) and chloride (60%), both essential nutrients needed by your body to function.
In fact, an article in the Journal of Cancer Detection and Prevention observes that from Paleolithic to modern times, man’s intake of potassium has significantly decreased, while sodium has significantly increased. The Sodium/Potassium ratio has been reduced by about 20X (R).
Where does our salt come from?
- About 75% of our daily salt intake comes from processed foods (R).
- Only 15% comes from knowingly adding salt (ie, cooking and table salt) (R).
- The remaining 10% occurs naturally in whole foods (R).
Recommendations From The Health Establishment
Major United States health organizations advise limiting our sodium intake to under 2300 mg per day:
- The United States Department of Agriculture (USDA), creator of the Food Pyramid and now the MyPlate says limit to 2300 mg per day (R).
- The Academy of Nutrition and Dietetics (AND) recommends 1500 to 2300 mg (R).
- The American Diabetes Association (ADA) also says 1500 to 2300 mg (R).
- The American Heart Association (AHA): 1500 mg (R).
So the establishment says to try to keep sodium under 1500 mg per day and to never exceed 2300 mg.
In normal, everyday measurements, that would involve aiming for less than 1 teaspoon per day.
The Bad: Potential Problems With Too Much Salt
Excess Salt May Worsen Inflammation
When I increased my salt intake, I noticed more issues with inflammation, but maybe only because I was susceptible to Th17 inflammation.
It may just be wise to limit salt if you have issues with Th17 inflammation or certain cancers (R).
Excess Salt May Raise Blood Pressure
And these are the top two causes of death in wealthier countries (R).
A 2013 Cochrane review found that in people with high blood pressure, reducing salt lowers blood pressure by 5.4 points systolic and 2.8 points diastolic. Individuals with normal blood pressure show a reduction of 2.4 and 1.0 (R).
Another study found that lowering sodium intake was more effective at reducing blood pressure in Black and Asian patients than in Whites (R).
Studies have actually found that salt consumption does not raise your risk of heart disease or death. So there is no reason to restrict salt due to concerns over cardiovascular health or longevity (R).
It may just be wise to restrict it if your blood pressure tends to be high, and you want to keep it within normal range.
So, maybe take a look at your carbohydrate/sugar intake first, and then consider the salt.
Most of my clients have low blood pressure, and therefore salt may benefit these people.
So when it comes to salt, your individual biology is key.
Excess Salt May Increase Your Calorie Intake
High salt intake may cause you to consume more calories (11% more) than you would otherwise (R).
Excess Salt May Cause Headaches
In a study of sodium consumption and headaches, people who ate foods high in sodium – around 8 g per day – had one third more headaches than those who ate foods low in sodium – around 4 g per day (R).
Additionally, it made no difference whether the volunteers ate the standard Western diet or the DASH (Dietary Approaches to Stop Hypertension) diet (R).
However, it could be that foods that have higher levels of salt may cause headaches. These studies do not show causation.
Excess Salt May Cause Cognitive Decline
Excessive salt intake may contribute to cognitive issues.
In an animal study, a high salt diet led to a significant decrease in the naturally occurring antioxidants, and marked increase of damaging free radicals in the memory center of the brain (R).
A high-salt diet may accelerate decline in the elderly. In a rat study, older rats who were put on a high salt diet had significant worsening of blood pressure levels, memory, anxiety, and overall cognitive health (R).
But this is only one side of the story. See Potential Problems With Too Little Salt below…
Excess Salt May Cause Kidney Stones
Again, evidence on this topic is mixed, but it has been demonstrated that if you consume excess sodium, you lose more sodium and calcium in the urine (R).
Subjects who consumed the most sodium tended to lose the most calcium in the urine.
Higher calcium excretion may lead to kidney stone formation, particularly if fluid intake is inadequate.
But again, it could be the foods that are typically high in salt may increase calcium excretion.
Excess Salt May Increase Bone Loss
Increased losses of calcium in the urine, particularly in the context of low dietary calcium, could be problematic for those at risk for low bone density.
Excess Salt May Raise Your Risk for H. Pylori Infection
Excess Salt May Raise Risk for Certain Cancers
A comprehensive meta-analysis detected a strong adverse effect between total salt intake and salt-rich foods on the risk of stomach cancer in the general population (R).
These studies show an association and it doesn’t necessarily mean that salt is the problem. It could be that the types of foods which people eat with a high salt diet is the problem.
Excess Salt May Raise Your Risk for Cataracts
An observational study performed in Australia found a clear association between high sodium intake and the occurrence of cataracts, a condition of cloudy vision associated with aging (R).
An earlier study conducted in Italy also found a significant association between high salt intake . However, a higher intake of meat, cheese, and certain vegetables (cruciferous vegetables, spinach, tomatoes, peppers) was protective (R).
Excess Salt May Worsen Sleep Apnea
In a study of 97 patients, high sodium intake worsened sleep apnea if high blood pressure and high aldosterone were present (R).
The Good: Potential Problems With Too Little Salt
Too Little Sodium Can Increase Cardiovascular Stats and Risk
Too Little Sodium Worsens Insulin Resistance & Diabetes
Too Little Sodium Can Be Bad for the Brain
In a study of Dahl rats, salt restriction caused a decline in learning and memory (R).
So, excess salt is bad for the brain, and too little salt is also bad for the brain. It may be worth considering the role of other minerals needed for a healthy balance, such as potassium.
Too Little Sodium is Dangerous for Athletes and Those with Higher Vasopressin/Anti-Diuretic Hormone (ADH)
In athletes, a lower intake of sodium combined with a higher intake of water can cause hyponatremia (unnaturally low salt levels), which can lead to headaches, muscle cramps/weakness, or even seizures when severe (R).
Inflammation and infections can increase vasopressin, so you should be mindful if your vasopressin is high or low.
You can check your Vasopressin directly and BUN as an indirect measure.
What To Do?
Overall, you should not pay attention to a blanket statement anyone makes about salt — whether they claim that it is completely good/bad or healthy/unhealthy for everyone.
If you consume a whole-food diet with lots of fruits and veggies (potassium) and use salt (sodium) to taste, you’re probably fine.
However, in some cases more or less salt is better for you.
- If you are healthy, then simply use salt to taste.
- If you have chronic inflammation, figure out if that’s causing vasopressin to go up.
- If you have an autoimmune issue that causes higher Th17 immune activation, then do experiments with higher or lower salt
- If you have high blood pressure then it’s probably wise to use less rather than more.
- If you are an athelete, sweating a lot, or exercising a lot in a day, then go for more salt.
- If you have low blood pressure (under 110/70), experiment with more salt.
If you’re completely healthy and have normal blood pressure, then I see no reason to restrict salt. In this case, just consume it for optimal taste.
But in general, I think it’s one of those things that you should experiment with for yourself.
The most important thing is to pay attention to your body and ignore general recommendations.