All about Magnesium
What Is Magnesium?
Magnesium is an essential mineral your body needs every day. It plays a role in more than 300 processes in the body — from keeping your muscles and nerves working properly, to supporting your heart rhythm, strengthening your bones, and helping regulate your blood sugar. Despite how important it is, many Americans don't get enough of it.
Why Does It Matter?
Getting enough magnesium may help with a wide range of health conditions, including:
- Migraines – Regular magnesium intake has been shown to reduce the frequency and severity of migraines
- Blood sugar control – Higher magnesium intake is linked to a lower risk of developing type 2 diabetes
- Heart health – Magnesium helps regulate heart rhythm and may reduce the risk of certain arrhythmias
- Blood pressure – Adequate levels support healthy blood vessel function
- Sleep and mood – Many patients report better sleep and reduced anxiety with magnesium supplementation, especially if their levels are low
- Inflammation – Magnesium has been shown to lower markers of inflammation in the body
How Much Do I Need Each Day?
The Recommended Dietary Allowance (RDA) for magnesium varies by age and sex. Here are the daily targets for adults:
| Group | Daily RDA |
| Men ages 19–30 | 400 mg/day |
| Men ages 31 and older | 420 mg/day |
| Women ages 19–30 | 310 mg/day |
| Women ages 31 and older | 320 mg/day |
| Pregnant women (19–30) | 350 mg/day |
| Pregnant women (31–50) | 360 mg/day |
| Breastfeeding women (19–30) | 310 mg/day |
| Breastfeeding women (31–50) | 320 mg/day |
Higher amounts may be needed during pregnancy, intense physical activity, or if you have certain medical conditions such as diabetes. Ask your provider what's right for you.
Am I at Risk for Low Magnesium?
You may not be getting enough magnesium if you:
- Eat a diet high in processed or packaged foods
- Have type 2 diabetes
- Have gastrointestinal conditions like Crohn's disease or celiac disease
- Take certain medications (including diuretics and proton pump inhibitors)
- Drink alcohol heavily
How Can I Get More Magnesium?
The best sources of magnesium come from food:
- Leafy greens (spinach, Swiss chard)
- Legumes (black beans, lentils, chickpeas)
- Nuts and seeds (almonds, pumpkin seeds, cashews)
- Whole grains (brown rice, quinoa, oatmeal)
- Dark chocolate (70% cacao or higher)
- Avocado and bananas
Supplements are also available. Common forms include:
- Magnesium glycinate – well absorbed; good for sleep and anxiety
- Magnesium citrate – often used to support digestion and regularity
- Magnesium oxide – commonly available but lower absorption
Always check with your provider before starting a supplement, especially if you have kidney disease.
Talk to Your Provider
If you think you may be low in magnesium or are interested in supplementation, bring it up at your next visit.
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This handout is for informational purposes only and is not a substitute for personalized medical advice.
