TL;DR (±40 words)
Quick choice: sleep/stress → glycinate, cramps/bowel movements → citrate, general/energy → malate, budget/low effect → oxide, focus/memory → threonate. Start with 200–300 mg elemental Mg/day with a meal. Increase gradually; diarrhea = too much/or wrong form.
Why this guide?
"Which magnesium should I take?" is a top-3 question in my inbox. Yet, forms vary enormously in absorption, purpose, and side effects. Below, you'll find a short, practical decision aid with clear dosages (elemental Mg) and quick schemes.
What magnesium does (briefly)
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Involved in >300 processes: muscle function, nervous system, energy (ATP), sleep quality.
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Deficiency is common with high stress, intense training, low intake, or high alcohol/caffeine consumption.
The forms compared (brief & practical)
1) Magnesium glycinate (bisglycinate)
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Best for: sleep, stress/relaxation, sensitive stomach.
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Absorption: high, gentle on the bowels.
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Dosage (elemental Mg): 200–300 mg/day, in the evening with a meal.
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Plus: lowest chance of diarrhea.
2) Magnesium citrate
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Best for: (muscle) cramps, bowel movements (osmotic effect).
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Absorption: good; can activate the bowels.
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Dosage: 150–300 mg/day divided throughout the day.
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Note: sensitive → start lower or choose glycinate/malate.
3) Magnesium oxide
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Best for: budget, short-term bowel movement support.
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Absorption: low; draws water into the bowels → often looser.
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Dosage: preferably <200 mg/day elemental; often not the ideal daily choice.
4) Magnesium malate
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Best for: energy/reducing fatigue (malic acid bond).
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Absorption: good; mild on the bowels.
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Dosage: 200–300 mg/day, morning or with lunch.
5) Magnesium threonate
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Best for: focus/memory (crosses BBB).
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Absorption in brain: relatively high.
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Dosage: according to product—usually 100–200 mg elemental (higher capsules due to salt weight).
NB: Magnesium taurate (bound to taurine) is often chosen for heart/calming; we will discuss taurine in detail in the next blog.
Quick choice aid (1 minute)
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Need sleep/relaxation? → Glycinate (evening).
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Cramps/constipation? → Citrate (spread out; mind your bowels).
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General supplement/energy? → Malate (morning/lunch).
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Budget and bowel movement boost? → Oxide (not ideal daily).
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Cognition/focus? → Threonate (divide throughout day/evening).
Dosage & timing (elemental magnesium)
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Start: 200 mg/day with a meal (best tolerance).
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Build up: after 3–5 days to 300 mg/day if well tolerated.
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Sleep goal: take (partly) in the evening.
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Sensitive bowels? divide into 2–3 intakes (morning/evening).
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Hydration: drink enough; caffeine and alcohol increase need.
Tolerable Upper Intake Level (supplemental): ~350 mg/day elemental Mg (guideline). Higher doses possible under expert supervision; listen to your gut.
Common mistakes (and quick fixes)
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Starting too high → diarrhea. Fix: start lower / switch to glycinate/malate.
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Taking on an empty stomach → nausea. Fix: always with a meal.
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Only using oxide → little effect. Fix: choose glycinate/citrate/malate.
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No consistency → little difference. Fix: test daily for 4–8 weeks.
Safety & interactions
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Do not combine with: high doses of zinc/iron simultaneously → reduce each other's absorption (separate by 2–3 hours).
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Medication: antacids, antibiotics (tetracyclines/quinolones), bisphosphonates—at least 2–4 hours apart.
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Kidney problems? consult a doctor.
Practical schemes
Sleep & stress (glycinate):
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Day 1–3: 200 mg with evening meal.
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Day 4+: 200–300 mg, possibly 100 mg afternoon + 200 mg evening.
Cramps/bowel movements (citrate):
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150–300 mg/day divided (morning/evening). Reduce if bowel movements become too loose.
Energy/general (malate):
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200–300 mg with breakfast or lunch.
Do’s & Don’ts
Do’s
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Start low, build up.
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Take with a meal.
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Choose the form that suits your goal.
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Test for 4–8 weeks.
Don’ts
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Oxide as a “daily driver.”
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Everything at once with zinc/iron/antibiotics.
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Increasing too quickly after gut issues.
Conclusion
There is no "best" magnesium for everyone—purpose determines the form: glycinate for sleep/stress, citrate for cramps/bowel movements, malate for energy, threonate for focus. Start with 200–300 mg elemental Mg/day, with a meal, and test for 4–8 weeks.
👉 New: Beargymmies® Magnesium (bisglycinate-based) – gentle on your stomach, perfect before your evening routine. Combine with your daily creatine for a solid recovery stack.
