Most adults do well with about 100–200 mg of elemental magnesium from magnesium bisglycinate once or twice per day, and should usually stay at or under 350 mg/day from supplements unless a clinician tells them otherwise.

Quick Scoop

If you’re wondering “how much magnesium bisglycinate per day,” what really matters is the elemental magnesium (the actual magnesium, not the total capsule weight). Common guidance for healthy adults is:

  • General daily range from bisglycinate: about 200–400 mg elemental magnesium per day.
  • Typical starting point: 100–200 mg elemental magnesium in the evening for relaxation and sleep, then adjust slowly if needed.
  • Do not exceed: 350 mg/day elemental magnesium from supplements (does not include food sources) for most adults unless your doctor specifically approves more.
  • Total daily intake (diet + supplements): usually lands around 300–420 mg/day of magnesium for most adults, depending on sex and age.

Because magnesium bisglycinate is well absorbed and gentle, many people split the dose (for example 100 mg with dinner and 100 mg before bed) to reduce any chance of stomach upset.

Quick example: If your capsule is 100 mg elemental magnesium and your target is 200–300 mg/day, that’s usually 2–3 capsules spread over the day, staying at or under your personal limit.

Always talk with a healthcare professional before going higher than 350 mg/day from supplements or if you have kidney disease, heart rhythm issues, are pregnant, or take medications that interact with minerals.

Information gathered from public forums or data available on the internet and portrayed here.