Calcium-Magnesium Malate by Thorne

If you get little dairy or fortified foods, are plant-based, or are in the perimenopause to postmenopause window, calcium magnesium malate is a practical maintenance dose. It suits people with low dietary calcium and those with low or low-normal Magnesium, RBC (a red-blood-cell magnesium test). It’s also useful if you take acid-suppressing medicines, because malate forms absorb without stomach acid, and if you want steadier muscle function without the laxative effect common with magnesium oxide.

Calcium helps curb parathyroid hormone, the signal that pulls calcium from bone, so daily intake supports ongoing bone remodeling. Magnesium is a cofactor for vitamin D activation and for muscle and nerve conduction, so adequate levels reduce twitchiness and nighttime cramps. The malate salts (bound to malic acid, a citric-acid-cycle intermediate your cells use for energy) are well absorbed and gentler on the gut than carbonate or oxide, with absorption less dependent on stomach acid.

Take one capsule three times daily with meals for a total of 300 mg calcium and 300 mg magnesium. Splitting doses improves absorption and tolerance. If your Vitamin D, 25-Hydroxy is low, correct that in parallel, since vitamin D drives calcium uptake. This is a maintenance-level amount; if you have established deficiency or documented low bone density, your clinician may recommend higher calcium from diet plus targeted supplementation.

Calcium and magnesium bind many drugs in the gut. Separate by at least 4 hours from levothyroxine, tetracycline or fluoroquinolone antibiotics, and oral bisphosphonates. Thiazide diuretics raise blood calcium; loops waste magnesium. Chronic kidney disease raises the risk of high magnesium and calcium, so use only with medical guidance. If you form calcium-oxalate stones, take calcium with meals to bind dietary oxalate, and avoid over-supplementing beyond your diet’s needs.