Why do some people need more magnesium?

Genes like TRPM6 and TRPM7 code for magnesium transport channels in your intestines and kidneys. Variants can reduce how efficiently you absorb magnesium and how well your kidneys retain it, so your genetic need may run higher than the average recommendation.

Why is magnesium hard to measure?

Most of your body magnesium is stored in bones and soft tissues, not blood, so a normal serum magnesium level does not always mean your cells have enough. Genetic data adds useful context that blood tests alone can miss.

What are signs of low magnesium?

Muscle cramps, poor sleep, restless legs, tension headaches, and difficulty relaxing can all be associated with suboptimal magnesium, especially if your genetics suggest a higher-than-average need. These symptoms have many causes, so confirm with your practitioner.

Magnesium Runs 300+ Enzymes in Your Body: Here's How Genetics Sets Your Need

Magnesium powers over 300 enzymatic reactions, yet it is one of the most common deficiencies. Your genetics influence how much you actually need and how well you hold onto it, which is why standard recommendations can fall short for some people.

Part of Micronutrients and Strategic Supplementation, one of the nine areas in your Genomic Lifestyle Optimization Report.

By Mosaic BiodataMarch 3, 20261 min read

Magnesium Runs 300+ Enzymes in Your Body: Here's How Genetics Sets Your Need

Mosaic reads thisMagnesium Intake NeedsOver 300 enzymes depend on magnesium, yet requirements vary widely. Higher-need individuals often feel dramatic improvement in sleep, stress response, and muscle function from optimized intake. It's one of the highest-impact changes available.See this insight

Magnesium is involved in over 300 enzymatic reactions (muscle function, nerve signaling, energy production, DNA synthesis, blood pressure, sleep), and it's still one of the most common deficiencies. Your genetics influence both how much magnesium your body actually needs and how well it holds onto it, which is why the standard recommendation isn't the right target for everyone.

Why some people need more

Genes like TRPM6 and TRPM7 code for magnesium transport channels in your intestines and kidneys. Variants in these genes can affect how efficiently you absorb magnesium from food and how well your kidneys retain it. If your genetics favor faster excretion or lower absorption, you may need more magnesium than the average recommendation suggests.

This is especially relevant because magnesium status is notoriously hard to measure through standard blood tests. Most of your body's magnesium is stored in bones and soft tissues, not in the blood. So a "normal" serum magnesium level doesn't always mean your cells have enough. Genetic data adds a useful layer of context.

Signs your body might want more

Muscle cramps, poor sleep, restless legs, tension headaches, and difficulty relaxing can all be associated with suboptimal magnesium levels. These symptoms are common and have many possible causes, but magnesium is one of the first things worth investigating, especially if your genetics suggest a higher-than-average need.

What Mosaic covers

Your Mosaic report includes a magnesium need reading in the Micronutrients section. It reflects your genetic tendency for magnesium absorption and retention. Combined with how you feel and any relevant lab work, it helps you and your practitioner decide whether supplementation makes sense and at what level.

Want to see your own? The micronutrients and strategic supplementation area of your report reads the genes behind this post. Practitioner? Take the free Institute lesson on Methylation (One-Carbon).