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How to Get More Magnesium (Without Overcomplicating Things)
Food Sources (Always First):
Best sources (amounts per serving):
Pumpkin seeds (1 oz): 156 mg
Chia seeds (1 oz): 111 mg
Almonds (1 oz): 80 mg
Spinach (1 cup cooked): 157 mg
Cashews (1 oz): 74 mg
Black beans (1 cup cooked): 120 mg
Edamame (1 cup cooked): 100 mg
Peanut butter (2 tbsp): 50 mg
Dark chocolate (70-85%) (1 oz): 64 mg
Avocado (1 medium): 58 mg
Practical eating tips:
Sprinkle pumpkin seeds on salads, yogurt, or oatmeal
Use spinach as your salad base instead of lettuce
Snack on a handful of almonds or cashews
Choose dark chocolate (not milk chocolate) for dessert
Add black beans to soups, burritos, or rice bowls
Supplements (When Food Isn’t Enough):
Not all magnesium supplements are created equal. Here’s the honest breakdown:
Form Absorption Best For Common Side Effects
Magnesium glycinate Excellent Sleep, anxiety, general deficiency None (gentle)
Magnesium citrate Good Constipation, general deficiency May cause loose stools
Magnesium oxide Poor (4%) Constipation only (as laxative) Significant GI distress
Magnesium malate Good Energy, muscle pain Mild
Magnesium threonate Good (crosses blood-brain barrier) Brain health, cognitive function Expensive, less studied
Magnesium chloride Good Topical use (oils, lotions) Skin irritation possible
My personal recommendation: Start with magnesium glycinate. It’s well-absorbed, gentle on your stomach, and most people tolerate it well. Start with 200 mg at night (taken 1-2 hours before bed). Increase to 400 mg if needed and well-tolerated.
Important warning signs: If you experience diarrhea, you’re taking too much or the wrong form. Reduce the dose or switch to glycinate. If you have kidney disease, consult your doctor before any magnesium supplement.
Who Should Be Most Concerned About Deficiency?
Certain groups are at higher risk and should consider testing or intentional intake:
People with type 2 diabetes or insulin resistance (high blood sugar increases urinary magnesium loss)
Older adults (absorption decreases, and medications common in aging deplete magnesium)
People with GI conditions (Crohn’s, celiac, ulcerative colitis, chronic diarrhea)
Those taking certain medications: Proton pump inhibitors (PPIs for acid reflux), diuretics, some antibiotics, and chemotherapy drugs
Heavy alcohol users (alcohol increases urinary excretion)
Athletes (magnesium is lost through sweat)
Pregnant and breastfeeding women (requirements increase)
Should you get tested? Maybe. Ask your doctor for a red blood cell (RBC) magnesium test. The standard serum magnesium test is less accurate because your body maintains stable blood levels by pulling magnesium from bones and tissues. RBC magnesium reflects your deeper stores.
The Bottom Line (Realistic, Not Hype)
Here’s what I want you to take away from this article.
Magnesium is not a miracle. It won’t cure diabetes, reverse heart disease, or eliminate anxiety on its own. But adequate magnesium is necessary for those systems to function properly. You can’t build a house on a cracked foundation. You can’t expect your heart, brain, and bones to work well if you’re running on empty.
The good news? Most people can correct a deficiency with simple, affordable changes. Eat more pumpkin seeds and spinach. Consider a nightly magnesium glycinate supplement. Pay attention to how you feel after a few weeks.
The bad news? Most people don’t know they’re deficient. They blame their anxiety on life circumstances, their cramps on exercise, their poor sleep on stress. Sometimes those things are true. Sometimes they’re magnesium.
Try this for two weeks: add magnesium-rich foods to every meal. If you tolerate it, add 200 mg of magnesium glycinate at night. Notice your sleep. Notice your muscle tension. Notice your mood.
Worst case? Nothing changes, and you’re out fifteen bucks. Best case? You discover that a simple mineral was the missing piece all along.
Frequently Asked Questions
Can I take magnesium with other medications?
Generally yes, but there are exceptions. Magnesium can interfere with certain antibiotics (tetracyclines, quinolones), bisphosphonates (osteoporosis medications), and some diuretics. Take magnesium at least 2 hours apart from these medications. Always check with your pharmacist.
How long does it take to correct a magnesium deficiency?
With consistent dietary intake and supplementation, most people notice improvements in sleep and muscle cramps within 2-4 weeks. Full repletion of tissue stores can take several months.
Can you take too much magnesium?
From food: nearly impossible. From supplements: yes, but rare in people with healthy kidneys. Toxic levels cause diarrhea, nausea, abdominal cramping, and eventually irregular heartbeat. Stick to 400 mg or less from supplements unless supervised by a doctor.
Is topical magnesium (oil, spray, lotion) effective?
Evidence is mixed. Some people swear by it for muscle pain and report fewer GI side effects. Absorption through skin is likely lower than oral supplementation. Topical magnesium is fine to try, but oral forms are more reliably absorbed.