Magnesium — Stack & Timing
Educational timing and stacking information based on how Magnesium has been studied. Not a prescription. Not medical advice.
This is educational information only. Consult a healthcare provider before starting any supplement.
Stack & Timing Guidance
Educational summary based on how Magnesium has been studied and commonly used.
Commonly studied timing
Evening dosing (30–60 minutes before sleep) is supported by expert consensus for sleep-related benefits, as magnesium's relaxing properties may aid sleep onset; taking it with food is generally recommended to improve tolerability and reduce the risk of gastrointestinal discomfort.
Dose ranges used in studies
Research and expert consensus generally reference 200–400 mg of elemental magnesium daily; the form matters significantly, as magnesium glycinate (~14% elemental) and magnesium threonate differ in elemental magnesium content, so label doses in mg of the compound may not reflect actual elemental magnesium delivered.
↑ These are ranges from research studies, not personal dosing recommendations. Discuss with a clinician.
Commonly paired with
B6 may enhance magnesium absorption and cellular uptake, and the combination has been studied for stress and mood support
Calcium and magnesium are co-factors in bone metabolism and muscle function, and are frequently combined for skeletal health
Magnesium is required for vitamin D metabolism and activation; deficiency in one may impair the function of the other
Often combined with magnesium, calcium, and vitamin D to support bone health and proper calcium utilization
Safety & interactions
Magnesium supplementation is generally considered safe at studied doses, but excess intake can cause gastrointestinal side effects including diarrhea, nausea, and cramping; very high doses carry risk of hypermagnesemia, particularly in individuals with impaired kidney function.
- •May reduce absorption of certain antibiotics (e.g., tetracyclines, fluoroquinolones) if taken simultaneously
- •May interact with bisphosphonates used for osteoporosis by reducing their absorption
- •High-dose magnesium may enhance the effects of blood pressure-lowering medications
- •Zinc supplementation at high doses may compete with magnesium for absorption
Individuals with chronic kidney disease or renal impairment should use magnesium supplements only under medical supervision, as impaired kidneys cannot efficiently excrete excess magnesium, increasing the risk of toxicity; those with known hypersensitivity or certain cardiac conditions should also consult a healthcare provider before supplementing.