You can do everything right and still come up short on magnesium. That’s not a failure on your part. It’s actually how the human body works, and it’s becoming an increasingly recognized problem that most nutrition advice glosses right over.People assume that if they’re eating reasonably well, leafy greens, whole grains, maybe some almonds thrown into a salad, they’re getting enough of this mineral. The problem is way more complicated than that. Recent research is revealing that magnesium deficiency isn’t just about what’s on your plate. It’s about absorption, medication side effects, the state of your gut, and even how much stress you’re carrying. Turns out, you can hit all your recommended intake targets and still be magnesium deficient.Let’s start with the scope of the problem. Globally, an estimated 2.4 billion people, roughly 31% of the global population, fail to meet the recommended magnesium intake levels. But here’s the thing, that number actually underestimates the real issue. Even when people are technically consuming enough magnesium according to nutrition surveys, they’re not actually absorbing or retaining it properly.A comprehensive review published in 2025 looked at something called the magnesium depletion score, basically a tool that accounts for factors beyond diet that affect whether your body can actually hold onto magnesium. The magnesium depletion score was inversely correlated with dietary magnesium intake across studies, meaning that despite eating magnesium-rich foods, people with higher depletion scores weren’t getting the benefit. The researchers analyzed 48 different studies and found that factors like alcohol use, kidney health, certain medications, and digestion issues were creating a gap between what people ate and what their bodies actually kept.The real kicker is what happens when you finally account for all these variables. People with high depletion scores faced significantly higher risks for chronic disease and early mortality. This wasn’t about mild nutrient insufficiency, this was linked to heart disease, type 2 diabetes, osteoporosis, and chronic inflammation that drives aging and disease.One major overlooked factor is medication. If you’re taking diuretics, certain antibiotics, or even some anti-inflammatory drugs, your body is actively losing magnesium through your kidneys. You can be eating a theoretically perfect diet and still be systematically depleted. Low magnesium status is associated with hypertension, type 2 diabetes, osteoporosis, migraines, depression, and chronic inflammation, whereas sufficient intake supports cardiometabolic resilience, skeletal strength, neurological stability, and healthy aging. But that’s precisely the point, the “sufficient intake” part is the hard part.
Magnesium and diabetes
The diabetes connection is particularly telling. A meta-analysis of 13 prospective cohort studies with over 536,000 participants found that each 100 mg/day increase in magnesium intake was associated with a relative risk of 0.86 for type 2 diabetes. In simple words, people who consumed more magnesium had a lower risk of developing diabetes by 14%. “The kidneys also play a role in controlling the amount of magnesium present in the body. They control how much magnesium is excreted in urine, meaning that the amount of magnesium a person’s kidneys allow to exit the body affects the level of magnesium in the body. For example, in patients with Type 2 Diabetes, urinary loss of magnesium is a frequent source of magnesium deficiency, despite the fact that these patients consume an adequate dietary amount of magnesium. In addition to this, excessive magnesium loss can occur as a result of drinking alcohol and chronic diseases that create metabolic and endocrine problems,” says Dr. Jayant Thakuria, Senior Director- Internal Medicine & Rheumatology, Yatharth Super Specialty Hospital Faridabad Sector 88. That’s substantial. But here’s what makes it complicated: if you already have diabetes, or metabolic problems that look like it, insulin resistance itself causes you to lose more magnesium in your urine. So people who most need magnesium are losing more of it than other people, even on the same diet.
Magnesium and absorption
Then there’s the issue of whether your gut can actually absorb what you’re eating. A 2024 study on children with type 1 diabetes found that about 10% of hospitalized patients have magnesium deficiency, and that poor glycemic control was significantly correlated with lower magnesium levels, suggesting that the metabolic chaos of diabetes literally prevents proper magnesium retention. But it doesn’t stop at diabetes. Any gastrointestinal disorder—IBS, Crohn’s disease, even occasional digestive issues—disrupts absorption. You’re eating fine, but your intestines aren’t cooperating.“The absorption and storage mechanisms of magnesium limit the ability of proper nutrition alone to guarantee that a person will have an adequate level of magnesium in his or her body. Most of the magnesium in the body is also absorbed by the intestines. The amount of magnesium found in individuals with chronic gastrointestinal disorders, for example, inflammatory bowel disease, malabsorption syndrome, or persistent diarrhea may not be as high as what that person has ingested because of the negative effect that these conditions have on absorption,” says Dr. Jayant Thakuria.There’s also emerging research on the gut-brain connection. Magnesium-deficient diets alter gut bacteria in ways that disrupt the gut-brain axis, which affects mood and mental health. So it’s not just a mineral insufficiency, it’s triggering deeper metabolic problems that make the deficiency worse.Blood tests also do not give a clear picture. “Also important to note; the blood contains a very small amount of the body’s magnesium; the vast majority will be held in the cells and bones, therefore, having a normal blood level of magnesium will not be determined as to an individual’s complete magnesium stores in the body. Clinical evaluation will, therefore, be more difficult for a deficiency. Therefore evaluation for magnesium status requires additional assessment than that simply by diet and requires a thorough clinical evaluation, laboratory test for underlying issues and kidney function along with possible subtle clinical signs or symptoms,” the doctor says. So what does this mean practically? It means eating well is necessary but not sufficient. It means paying attention to medications that might be depleting you. It means if you have digestive issues, diabetes, or you’re under chronic stress, you probably need to think more actively about magnesium status than someone else. And it means that some people genuinely benefit from supplementation even when they’re eating reasonably well, because the problem isn’t always the diet—it’s everything else happening in your body.The sooner people stop thinking of magnesium as just another thing to eat, and start thinking of it as something their body has to actively maintain and absorb, the sooner we can actually address what’s becoming a widespread silent health issue.Medical experts consulted This article includes expert inputs shared with TOI Health by: Dr. Jayant ThakuriaSenior Director- Internal Medicine & Rheumatology, Yatharth Super Specialty Hospital Faridabad Sector 88Inputs were used to explain why certain individuals lack magnesium despite having a balanced diet.
