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A Sixty and Me report highlights NIH guidance that long-term use of some proton pump inhibitors and diuretics can lower magnesium levels. The report says magnesium may not be included in routine blood work, and a blood result does not fully measure the body’s magnesium stores. People taking these medicines should discuss their medication history and whether testing is appropriate with a health professional, rather than stopping a prescription or starting supplements on their own.
A Sixty and Me report is urging people who regularly take certain heartburn or diuretic medicines to ask a health professional whether their magnesium should be checked, citing guidance from the National Institutes of Health. Long-term use of some proton pump inhibitors and diuretics can lower magnesium, while magnesium may not be part of routine blood work; the report does not establish an individual patient’s risk or recommend stopping prescribed medicine.
The NIH Office of Dietary Supplements says prescription proton pump inhibitors (PPIs) can cause low magnesium when taken for an extended period, typically more than a year. PPIs include omeprazole, esomeprazole, lansoprazole and pantoprazole. The medicines reduce stomach acid and are used for conditions including reflux and ulcers. The source advises people who take an over-the-counter PPI every day to tell their clinician how long they have used it; the cited NIH statement concerns prescription PPIs.
Some diuretics, or water pills, can also increase magnesium loss through urine with long-term use. The NIH names loop diuretics such as furosemide and thiazide diuretics such as hydrochlorothiazide. Potassium-sparing diuretics, including spironolactone, have a different effect and reduce magnesium loss, according to the NIH. These medicines are not interchangeable, and the report does not suggest changing a prescription without medical advice.
The report says the FDA advises doctors to consider checking magnesium before long-term PPI treatment and periodically afterward. The NIH identifies a blood test as the most commonly used and readily available way to assess magnesium, but says no single test is satisfactory. A clinician may consider a result alongside a person’s symptoms, medical history and medicines.
Why Medication Reviews Can Matter
The issue matters because medication effects can build over time, while a person may not know whether magnesium has been checked. The NIH lists older adults among groups at risk of low magnesium, citing factors that can include lower intake, reduced absorption, greater magnesium loss through the kidneys, chronic illness and medicines that affect levels. This is risk context, not evidence that every older adult taking a PPI or diuretic has a deficiency.
Low magnesium can involve loss of appetite, nausea, vomiting, fatigue or weakness. More severe deficiency can be associated with numbness, tingling, muscle cramps, seizures, personality changes and an abnormal heart rhythm, according to the NIH information cited in the report. Those symptoms have many possible causes, so they do not by themselves establish magnesium deficiency. The report says seizures or a racing or irregular heartbeat require prompt medical care.
A medication review can help a clinician decide whether testing or other checks make sense. The practical point is not to diagnose a deficiency from a symptom or a medicine name, but to bring a complete list of prescriptions and over-the-counter products to a health professional and ask whether any could affect magnesium.
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What the Guidance Says About Testing
Magnesium is found mostly in bones and soft tissues; less than 1% is in the blood, according to the report’s account of NIH information. The body regulates blood magnesium closely, and the NIH says blood levels have little correlation with total magnesium in the body. That limits what a single result can tell a clinician about overall stores.
The source also says magnesium is not routinely evaluated as part of standard electrolyte testing in hospitals and clinics. A basic chemistry panel may therefore not include it. A normal blood result does not prove that magnesium stores are full, but the blood test remains useful: a low result gives a clinician a finding to assess and act on. The FDA recommendation cited in the report specifically concerns considering magnesium checks for people taking PPIs long term.
For scale, the NIH figures in the report list 156 milligrams of magnesium in an ounce of roasted pumpkin seeds, 80 milligrams in an ounce of dry-roasted almonds, 78 milligrams in half a cup of boiled spinach and 60 milligrams in half a cup of cooked black beans. The stated recommended daily amount for women over 50 is 320 milligrams. Food examples are not a substitute for advice tailored to a person’s health or diet.
What a Magnesium Result Cannot Show
The source material does not provide a publication date, new study results or patient-level data, and it does not estimate how often low magnesium occurs among all people who use these medicines. The FDA figure cited for PPI cases comes from reported cases reviewed; it is not a general rate or a prediction for an individual. The report also does not identify which patients should be tested beyond the guidance it attributes to the FDA and NIH.
A normal blood result cannot establish that total magnesium stores are full, and symptoms such as fatigue or cramps can have other causes. Whether a test is appropriate depends on a person’s medicines, health conditions and clinical history. The source warns that magnesium supplements can be risky for people with kidney disease because impaired kidneys may not clear excess magnesium well. Readers should seek individual guidance rather than use the report to self-diagnose or supplement.
Questions to Take to a Clinician
The report recommends writing down all prescription and over-the-counter medicines, including heartburn products, and noting how long each has been used. Patients can ask a doctor or pharmacist whether any medicine affects magnesium, whether it has been checked, and whether testing is appropriate for their circumstances.
People should not stop a prescribed PPI or diuretic based on the report alone. They should speak with the prescribing clinician before changing treatment, and ask before taking a magnesium supplement, particularly if they have kidney disease. A clinician can review the medication list and decide whether a blood test or other evaluation is warranted.
Key Questions
Which heartburn medicines are linked with low magnesium?
The report cites NIH guidance that prescription proton pump inhibitors, including omeprazole, esomeprazole, lansoprazole and pantoprazole, can cause low magnesium with long-term use, typically more than a year. People who use an over-the-counter PPI every day should tell their clinician how long they have taken it.
Can water pills affect magnesium?
Some can. The NIH identifies long-term use of loop diuretics and thiazide diuretics as increasing magnesium loss in urine. Potassium-sparing diuretics such as spironolactone reduce magnesium loss, according to the same guidance. Ask a clinician or pharmacist about a specific medicine.
Does a normal blood test rule out low magnesium stores?
No. The NIH says blood levels have little correlation with total magnesium in the body because most magnesium is in bones and soft tissues. A blood test is commonly used and can identify a low result, but a clinician may also consider symptoms, medical history and medicines.
Should I stop my medicine or start a supplement?
Do not stop a prescribed medicine or start a magnesium supplement based only on this report. Discuss your medication list and whether testing or supplementation is appropriate with a health professional. This is especially relevant for people with kidney disease, who may have difficulty clearing excess magnesium.
Source: sixtyandme.com
