Trap 1
The Muscle Lock: Magnesium Trapped in the Gut
To absorb dietary magnesium, your intestine relies on microscopic mineral gates called TRPM6 and TRPM7 transport channels. These gates strictly require an acidic environment to stay open.
Without stomach acid, those gates shut down. The magnesium from your food passes right through your digestive tract and out of your body.
In your skeletal muscles,
calcium acts as the gas pedal (causing muscle fibers to contract),
and magnesium acts as the brake release (allowing muscle fibers to relax).
When your magnesium tank runs empty, your muscle fibers are driving around with the brake dragging all day. The moment you lie down at night and your circulation slows, the muscle seizes into an acute, involuntary lockup: the agonizing 3 AM calf cramp.