What supplements help with perimenopause?
Magnesium glycinate (300-400mg) for sleep/anxiety/cramps. Black cohosh (20-40mg) reduces hot flashes by ~26%. Vitamin D (2,000-5,000 IU) for bone density. Ashwagandha for cortisol/stress. Start there before trying everything on the shelf.
- Magnesium: sleep, anxiety, cramps
- Black cohosh: hot flashes (40-50% respond)
- Vitamin D + calcium: bone density (non-negotiable)
- Skip evening primrose oil (weak evidence)
Magnesium: Covers Multiple Symptoms at Once
Magnesium glycinate at 300-400mg daily helps with sleep, anxiety, and muscle cramps, three of the most common perimenopause complaints. It won't touch hot flashes directly, but fixing magnesium deficiency (common in women 40+) improves the symptoms that make perimenopause feel worse.
Take it before bed. The glycinate form has a calming effect. Most women notice sleep improvement within 1-2 weeks. That alone can make everything else more tolerable.
Quick Tips
- →300-400mg magnesium glycinate before bed
- →Helps sleep, anxiety, cramps simultaneously
- →Most women 40+ are low in magnesium
Black Cohosh: The Hot Flash Herb
Black cohosh is the most studied herb for hot flashes, with some trials showing 26% reduction in hot flash frequency. The German health authority (Commission E) actually approved it for menopausal symptoms.
Dose: 20-40mg standardized extract, twice daily. Give it 4-8 weeks. It doesn't work for everyone. Maybe 40-50% of women get meaningful relief. But when it works, it works well.
Safety note: rare liver injury reports exist. Get liver enzymes checked if you plan to use it long-term. Not ideal if you have a history of liver problems.
What Else Has Evidence (and What Doesn't)
Vitamin D + Calcium: bone density drops accelerate during perimenopause. 2,000-5,000 IU D3 plus adequate calcium (food-first, supplement if needed) is genuinely important. This isn't optional.
Omega-3 (2g EPA/DHA): some evidence for mood stability and joint stiffness that shows up in perimenopause.
Ashwagandha (300-600mg KSM-66): helps with the cortisol spike that many perimenopausal women experience. Better sleep, less anxiety.
What probably doesn't help: evening primrose oil (weak evidence for hot flashes), soy isoflavones (inconsistent results), dong quai (barely studied in Western trials).
Key Takeaways
Start with magnesium and vitamin D. Add black cohosh if hot flashes are your main issue. Ashwagandha if anxiety and sleep are worse. And talk to your doctor about HRT. Supplements can help, but they're not a replacement for medical care during this transition.
Ingredients Mentioned
Magnesium Glycinate
Ashwagandha
Vitamin D3
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