Understanding My Sensitivity to Magnesium Supplementation
I am a 65-year-old female, weighing 170 pounds, and I currently do not take any medication. Throughout the years, I have come across numerous articles highlighting the advantages of incorporating magnesium into one’s diet, with many experts suggesting daily doses between 400mg to 800mg. About a decade ago, I decided to give it a try, starting with a 400mg dosage. Almost immediately, I noticed a significant reduction in my heart rate, prompting me to lie down until the sensation subsided. When it finally did, it was quite uncomfortable. I experienced severe nausea and what felt like intense spasms in my intestines, culminating in substantial diarrhea. I understand that magnesium can have a laxative effect, and in my case, that was certainly true. Since that initial experience, I've tried a variety of magnesium forms and different dosages, yet I consistently find myself unable to tolerate it. Even a small quantity, like 100mg, triggers similar but less intense reactions for me. Now I’m curious about why I experience such sensitivity to any magnesium supplementation. Does anyone have insights? Thank you for your input.
Answers (1)

6/28/2025, 5:20:39 PM
OpenHealth AI
It sounds like you've had quite a challenging experience with magnesium supplementation, and I appreciate you sharing your situation. Your sensitivity to magnesium seems to lead to significant discomfort, which is understandable given the symptoms you've described.
Understanding Your Sensitivity
Magnesium can affect individuals differently. Some key reasons for your sensitivity might include:
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Gastrointestinal Reactions: Magnesium has a well-known laxative effect, particularly in certain forms like magnesium citrate and magnesium hydroxide. This can lead to nausea, diarrhea, and abdominal cramps, as you've experienced.
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Absorption Issues: Your gastrointestinal tract may be particularly sensitive or less able to handle magnesium at any dosage, leading to adverse reactions.
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Underlying Conditions: Factors such as changes in gut health, an imbalance of other electrolytes, or even medication sensitivities can contribute to how your body reacts to magnesium.
Next Steps
Here’s what you can consider doing:
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Avoid Magnesium Supplements: Since you've had multiple negative experiences, it's best to refrain from both high and low doses of magnesium supplements. You can still focus on acquiring magnesium through food sources instead.
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Focus on Dietary Sources: Incorporate magnesium-rich foods into your diet. Good sources include:
- Leafy green vegetables (like spinach and Swiss chard)
- Nuts and seeds (such as almonds and pumpkin seeds)
- Whole grains (brown rice, quinoa)
- Legumes (black beans, chickpeas)
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Keep Track of Reactions: If you do choose to try magnesium in the future, consider keeping a detailed diary of your reactions. This can include what form you took, the dosage, and any symptoms experienced. This could help identify any tolerable forms or dosages, if you decide to revisit magnesium in different contexts.
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Stay Informed: Given your symptoms, it may also be helpful to look into other minerals or vitamins that support health without causing adverse effects, especially as you age.
If you have concerns about magnesium levels in your diet or any other nutrient deficiencies, consider discussing these with a healthcare professional, who can provide tailored advice based on your health history.
Your comfort and well-being are the most important, so focusing on dietary sources may provide a more gentle approach to maintaining magnesium levels without the side effects you've experienced.
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