Stacy Sims on Magnesium
3 episodes · 5 references · 2026
- Sims recommends magnesium primarily for sleep, emphasizing forms that cross the blood-brain barrier (bisglycinate, threonate) - Advises supplementing only if deficient, and warns against magnesium oxalate due to laxative effects - No evidence of personal consumption or specific dosing guidance discussed
Benefits
- Magnesium supports sleep by promoting muscle relaxation and reducing contractions - Facilitates parasympathetic activation, which is the mechanism behind improved sleep quality - Specifically highlights the sleep benefit as the primary reason to consider magnesium
Best Practices
- Recommends magnesium bisglycinate or threonate as preferred forms that cross the blood-brain barrier - Advises supplementing only if you know you are low in magnesium - Threonate specifically recommended for sleep via parasympathetic activation
Cautions
- Warns against magnesium oxalate due to its laxative effect - Stresses being "very conscious" about form selection — look specifically for bisglycinate or glycinate - No warnings about upper dose limits or drug interactions discussed
“If you know that you are low in magnesium, then you take it.”
Dr. Stacy Sims: Should women take creatine? A physiology-based masterclass for midlife hormones
“We need a magnesium that crosses the blood-brain barrier to help, and this is a bisglycinate.”
Collagen, Magnesium, and Creatine for Women: What Works, What Doesn’t, and How to Use Them
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