Copper and Magnesium: How the Two Minerals Power Cellular Energy

Why copper and magnesium work as a pair

Copper and magnesium meet at the most basic job a cell has: making energy. In Minerals Revolution, Ethan Fialkow describes both minerals as required for the final step of ATP production, and both as being depleted from soil and food over the last century. Low levels of one tend to show up alongside low levels of the other, and the book's protocol restores them together.

Copper, magnesium, and ATP production

Cells burn glucose in three phases. Glycolysis happens outside the mitochondria and depends on magnesium at key steps. The Krebs cycle runs inside the mitochondria and needs magnesium too. The last phase, the electron transport chain, sits in the inner mitochondrial membrane, which the book describes as functionally dependent on copper. Cytochrome c oxidase, the copper enzyme at the end of that chain, is where oxygen gets used.

Then comes ATP synthase, a molecular rotor the book describes as spinning at around 9,000 RPM and producing roughly three ATP per turn. The book stresses that this final complex requires both magnesium and copper to be present.

What Mg-ATP means

Cells spend ATP in a magnesium-bound form called Mg-ATP. The book puts it plainly: without enough copper and magnesium, cells fail to make ATP properly and fail to bind it to magnesium. So a shortfall in either mineral hits energy twice.

When the mitochondria are short on either one, electrons do not move cleanly and oxygen is not fully used. The result, per the book, is more reactive oxygen species and more oxidative stress. Excess iron makes this worse. The book calls iron the trigger for the loss of magnesium, and without enough bioavailable copper, iron builds up inside mitochondria. Read copper and iron and what copper does for the body for that side of the story.

How much magnesium the RDA says you need, and what researchers proposed

The book's chapter on the RDA uses magnesium as its lead example. The RDA was designed as a floor for survival, based on average body weights, and the figures lag the science.

The proposed numbers are roughly three times the older ones. The book also points out that magnesium is needed to absorb vitamin D, so low magnesium drags other nutrients down with it.

Why serum magnesium misleads

An adult body holds about 25g of magnesium. Half or more sits in bone, most of the rest in soft tissue, and less than 1% is in blood serum. Serum levels are held within a tight range regardless of what is going on in tissue.

That is the problem with the standard test. The book notes that serum magnesium has little correlation with total body magnesium or with levels in specific tissues. Other methods exist (red blood cell magnesium, ionized magnesium, urine, loading tests), and no single one is considered satisfactory. A normal serum result does not tell you your cells are full. Serum copper can mislead in a similar way, as our ceruloplasmin page explains.

The body also adapts. When magnesium intake is low, intestinal absorption can rise from its usual range to about 80%, and the kidneys hold on to most of what they filter.

Magnesium malate vs glycinate: timing in the protocol

Magnesium is the third start in the book's mineral optimization protocol. The book splits it by form:

• Magnesium malate in the morning and afternoon. It tends to be energizing.
• Magnesium glycinate in the evening. It tends to be relaxing.

Magnesium is ideally taken with food. It can be taken on an empty stomach, though some people find that uncomfortable. The book notes that glycinate has about four times the bioavailability of magnesium oxide, and that oral magnesium appears substantially more effective than topical. Start low and build slowly. Loose stools are the common sign you moved too fast. The book gives its target intake and how to reach it.

Adding copper alongside magnesium

Magnesium comes earlier in the protocol than copper, which gives the base time to settle. When copper begins, the book's rule is to start low and increase gradually. Copper is taken with food, ideally protein, and the book lists calcium, potassium, meat, eggs, and citrus as supporting its absorption.

We sell Albion copper bisglycinate in 10mg capsules and 20mg capsules, each in 30-count bottles with bovine gelatin shells. The commonly cited adult upper limit is 10mg per day, a figure Ethan considers conservative. For dosing and sequencing, use the book. For a brand-level list, see Ethan's recommended supplements.