A complete safety, timing, and dosage guide for combining Magnesium (Citrate, Glycinate, Oxide, Threonate) with Manganese — 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 manganese together safely; no significant interaction exists between these two minerals.
Magnesium and manganese together are neutral and safe, with no meaningful interaction at typical supplement doses. Combining magnesium and manganese does not reduce absorption, compete for transport, or produce adverse effects in healthy adults.
Magnesium and manganese are both divalent metal cations, but they mostly use different absorption pathways in the small intestine. Magnesium is absorbed passively and via active transport (TRPM6/7), while manganese is taken up mainly through DMT1, the same transporter used by iron. At typical supplemental doses, any competition for DMT1 is negligible because the intestine can upregulate and the two minerals do not share affinity for the same channels at physiologically relevant concentrations. Once absorbed, manganese is tightly regulated by the liver and excreted in bile, while magnesium is regulated by the kidneys; neither disrupts the other's metabolic balance. There is no known enzyme, receptor, or signaling pathway where magnesium and manganese directly interfere with each other's actions.
If you need both magnesium and manganese, there is no reason to separate them — you can take them together in the same meal. I generally suggest taking magnesium in the evening if it helps you relax, and manganese with breakfast or lunch to align with your daily intake of food and other minerals. There is no need to wait between them; a gap of zero minutes is perfectly fine. If you are also taking calcium or iron, give yourself at least a two-hour buffer between those and manganese, because calcium and iron have stronger transport competition with manganese. For magnesium, you can take it at the same time as calcium or iron without the same competition issue. If you miss a dose, just take it with your next meal unless it is close to your next scheduled dose — do not double up.
The magnesium form you choose — citrate, glycinate, oxide, or threonate — does not change the lack of interaction with manganese. Magnesium oxide is less bioavailable than citrate or glycinate, but this only affects how much magnesium your body absorbs, not how it behaves with manganese. Manganese supplements typically come as gluconate, sulfate, or a chelated amino acid complex; these forms all behave similarly with magnesium. If you are sensitive to loose stools, magnesium oxide may be more likely to cause digestive upset, but that is a separate consideration from the manganese combination.
Magnesium and manganese appear together in some bone-health and joint-support powders that also include calcium, zinc, and vitamin D. They are also combined in certain athletic recovery formulas, though manganese is less common in these than in bone-specific products.
Yes, you can take them at the same time because they do not compete for absorption at typical doses. I would just take them with food to avoid stomach upset. There is no need to separate them.
Yes, it is safe to combine them every day as long as you stay within standard supplement doses — up to 350 mg of elemental magnesium and no more than 11 mg of manganese from supplements. I would not exceed those amounts without a doctor's guidance.
You do not need to wait at all. I recommend taking them together with a meal. If you prefer, you could take them a few hours apart, but there is no benefit to doing so.
No, they do not significantly compete for absorption. They use different transporters and regulatory mechanisms in the gut. Even at higher doses, competition is minimal and would not cause a deficiency in either mineral.
People with advanced kidney or liver disease should avoid manganese supplements and be cautious with magnesium, since both minerals depend on these organs for removal. Pregnant women and anyone with iron-deficiency anemia should also check with their healthcare provider before adding manganese.
I recommend taking both with food to improve tolerance and absorption. Magnesium — especially glycinate or threonate — can be taken on an empty stomach if you prefer, but manganese is more likely to cause nausea without food, so a meal is safest for the combination.
Reviewed by Caroline M. on June 10, 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.