In fact, salt
deficiency is fairly prevalent and can cause a range of problems including
muscle fatigue, spasms, cramps and heart palpitations.
Keep in mind that in
the 1600’s the typical person was eating up to 100 grams of salt per day coming
from salty fish and meats. Today people
get 10 grams of salt per day or less, but at the same time we have much higher
rates of high blood pressure.
There are groups of
people who do need to have a lower salt intake and monitor their intake
accordingly. In addition, you should
always follow your health care professional’s advice regarding diet and
supplementation!
Salt and Blood Pressure
The key reason
everyone associates salt with high blood pressure is the “DASH” study aka
Dietary Approaches to Stop Hypertension which showed that low salt intake
resulted in dramatic improvements in blood pressure. However, this diet was not only low in salt
it was also very low in processed foods and sugar and high in potassium.
In addition, a
researcher named Lewis Dahl conducted population analysis showing that
increased salt intake was associated with deaths from heart disease. However, his “research” was seriously flawed
because he selected populations who fit his theory and neglected to include
those that did not! When you include
all the populations the salt association with heart disease disappears.
In the 1988 study
researchers examined salt intake and disease in 52 populations including four
primitive cultures that consumed virtually no salt. When they eliminated the four primitive
cultures and focused on the 48 civilized populations they actually found a
reduction of blood pressure as salt intake was increased! The four primitive cultures are completely
different in that they have huge intakes of potassium and magnesium, do not
drink alcohol, do not consume sugar, and have a very high activity level so
comparing them to modern civilizations is a big error!
Can Low Salt Intake Cause Problems?
Although lowering salt intake may lower blood
pressure in some it also tends to worsen your total cholesterol to high-density
lipoprotein ratio in some people, which is strong predictor of heart disease
along with increasing triglycerides and insulin. The end result can be that
your heart disease risk increases even though your blood pressure is
lower.
Salt deficiency can increase insulin resistance
because one of the ways the body preserves salt when intake is low is by
raising insulin levels which helps the kidneys retain more salt. Insulin resistance equals diabetes and
increased fat storage!
Low Carb Intake and Salt
Another important factor relating to salt intake and health is
that your body treats salt very differently if you are eating a diet that is
low in sugar and starch. When non-fiber carbohydrate intake is
low, insulin is low and as a result the kidneys excrete MUCH higher levels of
sodium (salt). The primary reason
people switching to these types of diets experience “flu” like symptoms is low
sodium levels. By simply dramatically
increasing salt intake the symptoms immediately disappear.
People who switch to a true low carbohydrate
diet lose an additional 1 – 2 grams of sodium (salt) per day and because of
lower glucose levels they absorb less sodium as well. The bottom line is that it is important to up
your salt intake if you are eating a diet that is really low in sugar/starch!
Salt intake and Bone Health
Salt intake also strongly influences magnesium
and calcium levels. If you do not get
enough salt your body pulls sodium from your bones along with calcium and
magnesium to keep your sodium level normal!
So low salt intake can impact bone health.
Caffeine and coffee along with alcohol greatly
increase salt excretion so if you drink either there is another reason to
maintain adequate salt intake!
What does your body do with excess Salt?
The body is designed to precisely regulate
sodium levels because salt is essential for the function of all your
cells. When given a chance the body
regulates salt levels very precisely, UNLESS you are in one of the key groups
mentioned below.
It you eat a diet of unprocessed whole foods
high in fruits and vegetables you will get VERY little salt unless you add
other salty foods or add salt to your foods.
Your body also tells you how much salt you need
by regulating your craving for salt so pay attention to it! Heavy sweating and exercise along with
caffeine and alcohol intake all increase salt depletion.
What Kinds of Salt?
When adding salt to food it is best to use
natural, unprocessed salt. Be careful
with Sea Salts because they do NOT contain iodine which is a very common
mineral deficiency which can cause or exacerbate low thyroid issues. Himalayan Salt and Redmond Real Salt are the
best types of salt available and both contain iodine as does regular table
salt.
People Who Should Avoid High Salt Intake
Salt sensitive groups include people with:
Certain Endocrine Disorders
High Aldosterone Levels causing salt retention
problems
Cushing’s Syndrome
Elevated cortisol levels
Liddle Syndrome which affects 1 in 1 million
people causing salt retention
Problems that Cause High Sodium Excretion (meaning you have to be
careful to make sure you get ENOUGH Salt!)
Lower sugar and starch intake – under 100 grams
per day of starch/sugar.
Inflammatory Bowel Diseases like Crohn’s and
Ulcerative Colitis
Bariatric Surgery
Kidney Disease – salt and potassium intake must
be precise in all those with kidney disease and you must follow the advice of a
health care professional!
Sleep Apnea
Hypothyroidism – thyroid hormones help us
reabsorb salt
Adrenal deficiency
Celiac Disease
Heavy Exercise and Sweating – for competitive
endurance athletes – preloading with 1 gram of sodium along with other
electrolytes can dramatically improve exercise capacity because it boosts blood
volume!
Fasting
Sodium/Potassium Balance
You should consume about five times more potassium than sodium,
but most Americans eat twice as much sodium as potassium. If you're eating mostly processed foods and
few fresh vegetables, your sodium-to-potassium balance is virtually guaranteed
to be the opposite. The key is a heavy
intake of fruits and vegetables along with nuts.