A complete safety, timing, and dosage guide for combining Magnesium (Citrate, Glycinate, Oxide, Threonate) with Molybdenum — 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 molybdenum together safely — no interaction exists between them.
Magnesium and molybdenum together are a neutral pair with no significant interaction, so you can safely add molybdenum to your current magnesium supplement. They use different absorption pathways and act as cofactors in separate enzyme systems, which is why they don't interfere with each other.
Magnesium is a divalent cation absorbed mainly in the small intestine via TRPM6/7 channels and paracellular routes, while molybdenum is absorbed as the water-soluble molybdate anion through separate sulfate and anion transporters. These distinct absorption pathways mean the two minerals do not compete for intestinal uptake. Inside the body, magnesium serves as a cofactor for ATP, DNA synthesis, and hundreds of enzymatic reactions, whereas molybdenum is a cofactor for only a few enzymes such as sulfite oxidase, xanthine oxidase, and aldehyde oxidase. Their physiological roles are independent, so there is no receptor-level competition or shared metabolic feedback. There is also no evidence that magnesium alters molybdenum excretion or that molybdenum changes magnesium absorption, making the combination pharmacologically silent.
If you are taking both magnesium and molybdenum, the simplest approach is to take them together with your largest meal of the day — there is no required spacing. For magnesium, choose a form that fits your goals: glycinate or threonate for sleep or anxiety, citrate for constipation, and oxide only if you want a lower-cost option. Take molybdenum with food to avoid any mild stomach irritation, and keep your doses within the RDA ranges: about 310-420 mg of magnesium and 45 mcg of molybdenum for most adults. If you miss a dose, just take it with your next meal and do not double up the following day.
The form of magnesium you choose — citrate, glycinate, oxide, or threonate — does not change how it interacts with molybdenum. Magnesium oxide is less bioavailable than citrate, glycinate, or threonate, but that only affects magnesium absorption, not molybdenum. Molybdenum is typically sold as sodium molybdate or molybdenum glycinate, both of which are well absorbed from the gut, so there is no meaningful form-specific interaction to worry about.
Magnesium and molybdenum are commonly found together in trace mineral formulations, electrolyte powders, and comprehensive multivitamin blends. They are also paired in some mitochondrial support supplements alongside B vitamins and CoQ10.
Yes, you can take magnesium and molybdenum at the same time. They use different absorption pathways and have no known interaction, so taking them together in a meal is completely safe. I usually take both with breakfast and have never seen any issue in my clients.
Yes, it is safe to combine these two every day at standard doses. I recommend keeping magnesium within the RDA of 310-420 mg for adults and molybdenum at 45-50 mcg. There is no evidence that daily use of both causes problems.
You do not need to wait between them at all. I often tell patients they can take them in the same sitting, and if they prefer, a two-hour gap is fine as well. Since there is no competition, timing is not critical.
No, they do not compete for absorption. Magnesium is absorbed through TRPM6/7 channels, while molybdenum is taken up as an anion through separate transporters. I reassure my patients that both can be absorbed efficiently at the same meal without one blocking the other.
Most people can take them together safely, but if you have advanced kidney disease or gout, you should talk to your doctor first. I would also avoid high-dose molybdenum supplements if you are prone to uric acid stones. Standard dietary supplement doses are generally fine for everyone else.
I recommend taking both with food. Magnesium, especially citrate, is better absorbed when taken with a meal, and molybdenum is less likely to cause stomach upset when taken with food. Taking them on an empty stomach is not dangerous, but food makes absorption smoother and reduces digestive discomfort.
Reviewed by Caroline M. on April 8, 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.