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Place · Level 3
300+ 个酶的辅因子 · 让 ATP 真正能工作 · 让肌肉懂得放松
synergy · 5
Calcium contracts muscle; magnesium relaxes it. Both needed in balance.
Potassium/sodium shape membrane potential and fluids; magnesium supports ATP and relaxation.
Mg²⁺ plugs NMDA receptors and boosts GABA-A — insomnia + anxiety + cramps form a classic Mg-deficient triad.
Peikert 1996 Cephalalgia (N=81) Mg citrate 600 mg/d × 12 wk cut migraine frequency 41.6% (placebo 15.8%). Mechanism: NMDA antagonism + cerebrovascular smooth muscle relaxation + raised CSD threshold. AHS 2012 Level B prevention.
Magnesium participates in several B12-dependent methylation steps.
cofactor · 6
Both vitamin-D activation steps need magnesium as cofactor.
Severe hypomagnesemia paralyzes parathyroid PTH secretion AND target tissue PTH response → functional hypocalcemia that won't correct on calcium alone. Replete Mg first; calcium follows. Often missed in ED.
The pump that returns calcium to the sarcoplasmic reticulum burns an ATP-magnesium complex on every trip — without magnesium, ATP is unusable and calcium never gets back to the store. But a mechanism holding up doesn't mean the supplement works: Cochrane found no effect on cramps in the general population.
Mg-ATP complex powers every muscle contraction. Zone 2 training significantly increases Mg turnover; depletion-prone individuals (elderly, diuretic users) may need extra.
→Bone
Bone stores about 60% of your magnesium, some of it sitting on the hydroxyapatite crystal surface deciding how big the crystal grows. Magnesium is also a cofactor for the enzymes that activate vitamin D — short on magnesium, supplemented D never becomes the active form.
Magnesium is a supporting role in bone health but not an optional one: 320-420 mg/day elemental, involved in hydroxyapatite crystal formation and a cofactor on the vitamin D activation pathway. Short of it, the calcium-and-D machinery runs at a discount.
antagonism · 1
Nano-scale particles (under 100 nm) can enter cells and even mitochondria, disturbing the electron transport chain, raising ROS and lowering ATP output — and ATP does its work in the body as an ATP-Mg complex. This is a mechanistic inference; the human evidence is still early.
depletes · 1
Long-term PPIs and diuretics both lower magnesium — PPIs impair intestinal uptake, diuretics flush it from the kidney tubule; the FDA's 2011 warning makes serum-magnesium checks standard.