A complete safety, timing, and dosage guide for combining Magnesium (Citrate, Glycinate, Oxide, Threonate) with Copper — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can take magnesium and copper together—they do not interfere with each other's absorption or activity, so it is safe to combine them in the same routine.
Magnesium and copper together are a neutral, safe combination that supports muscle, nerve, heart, and red blood cell function. They use different absorption pathways, so you do not need to worry about one blocking the other. Combining them daily is practical and well tolerated for adults.
Although both magnesium and copper are positively charged metal ions that are absorbed in the small intestine, they rely on distinct transport proteins. Magnesium is absorbed through the paracellular route and via TRPM6/7 channels, while copper is actively taken up by the Ctr1 transporter and then handled by ATP7A. Because these pathways do not overlap in a rate-limiting way, neither mineral blocks the other. Additionally, magnesium is a macromineral required in hundreds of daily milligrams, whereas copper is a trace mineral needed in microgram amounts, so their doses do not conflict. High doses of zinc can create a copper deficiency, but magnesium does not have this effect, making the pair particularly low-risk.
If you need both, the simplest approach is to take them together in the morning with breakfast. Copper absorbs well with a small meal, and magnesium is better tolerated when some food is present. There is no need to space them by hours, but if you prefer, you can take copper in the morning and magnesium in the evening. For daily dosing, aim for around 300-400 mg of magnesium from a well-absorbed form, and stick to a 2-mg copper supplement (or less) to stay within safe limits. If you miss a dose, simply resume with your next meal—avoid taking double copper the next day.
The specific form of magnesium you choose (citrate, glycinate, oxide, or threonate) does not change how it interacts with copper—there is no meaningful difference for this pairing. Copper bisglycinate or copper citrate tend to be gentler on the stomach than cupric oxide, but all copper forms combine safely with any magnesium form. If you pick magnesium oxide, be aware it is less bioavailable and more likely to cause loose stools, so this form may need to be taken with food.
Magnesium and copper are frequently included together in multi-mineral and daily wellness formulas, often alongside zinc, calcium, and vitamin D. Copper also appears in zinc-heavy muscle and immunity stacks to replace the copper that high-dose zinc depletes over time, while magnesium is added for muscle relaxation and heart rhythm support.
Yes, you can absolutely take them at the same time. They do not compete for absorption, so there is no need to separate them. I often tell patients to take both in the morning with breakfast for convenience.
Yes, it is safe to take both daily at recommended doses. Your body needs magnesium in relatively large amounts and copper in trace amounts, and they work through different pathways. I recommend following the amounts on your product label unless your healthcare provider gives you different guidance.
You do not need to wait between them at all. Unlike iron and calcium, which can interfere with each other, magnesium and copper are absorbed independently. If you prefer spacing for convenience, taking one in the morning and one at night is fine, but it is not required.
No, they do not meaningfully compete. They use separate transport proteins in the intestines, so taking them together does not reduce the absorption of either mineral. This is different from zinc and copper, which do compete at high zinc doses.
Most adults can take both safely. However, if you have Wilson's disease or another copper overload condition, you must avoid copper supplements. If you have advanced kidney disease, check with your nephrologist before taking magnesium, since impaired kidneys can struggle to clear magnesium.
I recommend taking both with food. Copper can irritate the stomach slightly when taken alone, and magnesium is better absorbed and more gentle on the gut with a meal. A small meal or snack with some protein and carbohydrate is perfect.
Reviewed by Caroline M. on April 26, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
The matrix has 86 supplements and 7310 pairwise interactions. Click any cell to see the full breakdown.