A healthy blood sodium level for older adults is typically 135-145 mEq/L, but seniors are prone to lower levels (hyponatremia), often due to medications or fluid imbalance, so doctors may watch for levels below 136-139 mEq/L; daily intake recommendations are around 1,500-2,300 mg, focusing on whole foods rather than processed ones to avoid excess, as low sodium can be risky but too much is also harmful, especially with age-related conditions.
That's because the range of normal sodium levels in the average person, including older adults, is 135 to 145 mEq/L.
If you are feeling thirsty or nauseated or have diarrhea or stomach cramps, too much sodium could be the culprit. Drink more water!
While the true cause is unknown, several factors have been implicated. Recent research suggests a link between a high-sodium diet and migraine attacks, either as a causative or aggravating factor.
In a retrospective analysis from a large ED, nausea, a history of falls, weakness and vertigo were the most common symptoms attributable to hyponatremia [2]. Moreover, somnolence, disorientation, headache, seizure and syncope were reported in patients with hyponatremia [2].
Hyponatremia signs and symptoms may include:
Hyponatremia can cause headaches, nausea, dizziness, confusion, muscle cramps, and in severe cases coma, seizures, and death. "These are difficult as they can also mimic signs of dehydration," says Cline.
In fact, sleeplessness, stress, and headaches can sometimes be linked to low sodium intake as a cause.
The deficiency of many nutrients including magnesium, niacin, riboflavin, cobalamin, coenzymes Q10, carnitine, α-lipoic acid and vitamin D is associated with migraine. Some researchers postulate that mitochondrial dysfunction and impaired antioxidant status can cause migraine.
The body needs a small amount of sodium to work properly, but in excess it can increase a person's risk for developing high blood pressure, which can lead to heart disease and stroke. That is why it is important to understand where most salt intake comes from and how to lower it.
Increased sodium intake can influence water absorption in the intestines, which in turn affects the water content of stool, increasing stool volume and moisture, preventing excessive dryness, and facilitating smoother bowel movements.
Hyponatremia is more common in older adults because they're more likely to take medicines or have medical problems that put them at risk of the disorder. These include: Drugs that cause the body to make more urine, called diuretics. Some types of antidepressants.
Red flags for diarrhea needing immediate medical attention include blood or black, tarry stools, severe abdominal/rectal pain, high fever, signs of severe dehydration (dizziness, little/no urine, extreme thirst), confusion, or diarrhea lasting more than a couple of days. For children, also watch for no wet diapers for 3+ hours, no tears when crying, sunken eyes, or unusual sleepiness, while adults should see a doctor for nighttime diarrhea or worsening symptoms.
While our bodies need sodium to help with muscle function and fluid balance, too much sodium can have serious consequences. Excess sodium is linked to high blood pressure, heart disease, and stroke—health risks that become even more concerning as we age.
How can you care for yourself at home?
Low-sodium salt might help reduce your sodium intake, which helps lower your blood pressure and risk of heart disease. Sea salt, pink Himalayan salt, low-sodium salt, kosher salt, and iodized salt are good alternatives.
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Studies have suggested that B6, B9, and B12 can reduce the severity and frequency of migraine attacks.
The worst symptoms of B12 deficiency involve severe nerve damage and cognitive issues, including tingling/numbness in hands and feet, trouble walking, memory loss, confusion, depression, and even dementia in severe, untreated cases, alongside severe fatigue, pale skin, and heart palpitations from anemia. These neurological and mental problems can become irreversible if the deficiency isn't treated promptly.
Most people with mild hyponatremia may not have any symptoms. If symptoms are present, it is usually when the level of sodium in your blood goes very low or drops very fast. These symptoms can include: Nausea and/or vomiting.
Salt is called the "silent killer" because consuming too much leads to high blood pressure (hypertension), which often has no noticeable symptoms but quietly damages your heart, blood vessels, kidneys, and brain, significantly raising the risk for heart attacks, strokes, and kidney disease over time, says the American Heart Association (AHA)](https://www.heart.org) and the [World Health Organization (WHO). The hidden danger comes from processed foods, not just the salt shaker, making it easy to overconsume without realizing the severe impact.
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Lightheadedness is when you feel like you might faint or pass out. Some people call it 'feeling woozy'. Lightheadedness is related to dizziness. Dizziness is when you feel unsteady or are having trouble keeping your balance.
Surprisingly, older adults are also at risk of overhydration for a number of reasons, including: Reduced kidney function, making it more challenging for the body to efficiently regulate fluid balance. Certain medications that can affect fluid and electrolyte balance, such as diuretics.
People need vitamin B-12 for the brain to work well. If not treated, vitamin B-12 deficiency can lead to issues with the nerves, brain or spinal cord. These might include lasting tingling in the hands and feet or trouble with balance.