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Low magnesium levels: Doctor explains causes, warning signs, and the best treatment options - The Times of India
Magnesium rarely gets the spotlight, but it has widely become known that it supports more than 300 enzyme reactions in the body. It helps muscles relax, keeps the heartbeat steady, and even plays a role in mood and sleep. So when levels dip, the effects are often subtle at first, then suddenly hard to ignore.
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Why do people have magnesium deficiency?
Magnesium rarely gets the spotlight, but it has widely become known that it supports more than 300 enzyme reactions in the body. It helps muscles relax, keeps the heartbeat steady, and even plays a role in mood and sleep. So when levels dip, the effects are often subtle at first, then suddenly hard to ignore.
What exactly is low magnesium and why it matters
Low magnesium, medically called hypomagnesemia, is often missed in routine health checks.
As Dr Deepesh V explains, “Low magnesium level or Hypomagnesemia is considered when the serum magnesium is below 1.6 milligrams per decilitre. This level varies according to the laboratory cut-offs.”
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That small drop can disturb multiple systems. The body does not store large amounts of magnesium, so even minor imbalances can show up in surprising ways.
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For context, a government-backed overview by the National Institutes of Health (NIH) explains magnesium’s wide role in nerve function, muscle contraction, and blood sugar control.
Why do magnesium levels fall in the first place?
Magnesium deficiency is not very common, but it tends to appear in specific situations.
Dr Deepesh V notes, “Low magnesium is not very common in the general population. It occurs in less than 2% of individuals, mostly in people who have alcohol use disorder, which results in decreased food intake. Alcohol, per se, increases the loss of magnesium through the urine.” When a key gene fails: What a new leukemia study is telling us about treatment There is a clear pattern in hospitals. “About 10% of hospitalized patients are detected with magnesium deficiency, and almost 50 to 60% of them are found in the ICU.”
The reasons are often layered. Some of the most overlooked triggers include:
Long-term use of medicines like diuretics and acid reducers Certain antibiotics and chemotherapy drugs Chronic diarrhoea or gut disorders that block absorption Poor nutrition over time Alcohol use that both reduces intake and increases loss
A report by Indian Council of Medical Research (ICMR) also highlights that micronutrient deficiencies in India often go unnoticed due to dietary gaps and absorption issues.
The ICU connection most people don’t know about
Magnesium levels often crash during critical illness. It is not just about diet anymore.
Dr Deepesh V explains, “The most common causes for low magnesium levels in the ICU include nutritional deficiencies, use of certain drugs like diuretics, proton pump inhibitors, certain antibiotics like aminoglycosides, cancer patients on chemotherapy, and transplant patients on Calcineurin Inhibitors (CNIs).”
In these settings, the body is already under stress. Organs struggle, medications interfere, and the balance of minerals shifts quickly. That is why magnesium is routinely monitored in critical care.
The early signs most people ignore
The first symptoms rarely look serious. They are often brushed off as fatigue or stress.
But the body is sending signals.
“Patients with low magnesium levels may have neuromuscular involvement in the form of muscle spasms or cramps, a condition called tetany,” says Dr Deepesh V.
Other early signs include: Persistent muscle cramps or twitching Weakness or low energy Tingling or numbness Poor sleep or irritability These signs can linger for weeks before anything severe appears.
When it turns serious: warning signs you shouldn’t miss
If levels continue to fall, the symptoms shift from mild to alarming.
Dr Deepesh V warns, “In severe hypomagnesemia, they may develop seizures. Cardiovascular symptoms include arrhythmias.”
There are deeper effects too. Low magnesium can disturb calcium balance, leading to bone issues and hormone changes.
This article is republished through the USVI News affiliate desk. Reporting, analysis, and viewpoints are those of the original publisher and do not necessarily reflect USVI News.