What are the side effects of magnesium supplements?
Samuel Coleman
Updated on May 08, 2026
Magnesium Risks
Magnesium supplements can cause nausea, cramps, and diarrhea. Magnesium supplements often cause softening of stool. Interactions. Magnesium supplements may interact with certain medicines, including diuretics, heart medicines, or antibiotics.Is there a downside to taking magnesium?
High doses of magnesium from supplements or medications can cause nausea, abdominal cramping and diarrhea. In addition, the magnesium in supplements can interact with some types of antibiotics and other medicines.What are the side effects of too much magnesium?
According to the Office of Dietary Supplements , symptoms of magnesium overdose may include:
- diarrhea.
- nausea and vomiting.
- lethargy.
- muscle weakness.
- abnormal electrical conduction in the heart.
- low blood pressure.
- urine retention.
- respiratory distress.
Is it OK to take a daily magnesium supplement?
The National Academy of Medicine recommends not exceeding 350 mg of supplemental magnesium per day ( 2 ). However, several studies have involved higher daily dosages. It's recommended to only take a daily magnesium supplement that provides more than 350 mg while under medical supervision.What are the benefits of taking magnesium daily?
Magnesium is an important mineral, playing a role in over 300 enzyme reactions in the human body. Its many functions include helping with muscle and nerve function, regulating blood pressure, and supporting the immune system.Should you take magnesium supplements, and what are the benefits of taking Magnesium?
What are the 10 signs of low magnesium?
10 Symptoms of Magnesium Deficiency
- Calcification of the arteries. Unfortunately, this is one of the first symptoms to appear, as well as one of the most serious. ...
- Muscle Spasming & Cramping. ...
- Anxiety & Depression. ...
- Hormone Imbalances. ...
- High Blood Pressure / Hypertension. ...
- Pregnancy Discomfort. ...
- Low Energy. ...
- Bone Health.
Is magnesium hard on your liver?
Magnesium supplementation can not only preserve liver function, but also slow the progression of liver disease, and reduce the mortality associated.Does magnesium raise blood pressure?
Magnesium intake of 500 mg/d to 1000 mg/d may reduce blood pressure (BP) as much as 5.6/2.8 mm Hg. However, clinical studies have a wide range of BP reduction, with some showing no change in BP.How do you know if you should take a magnesium supplement?
You might want to consider a magnesium supplement if you:
- Have long-term alcoholism and alcohol dependence, since your diet may be poor.
- Have osteoporosis, since you need more magnesium to help protect your bones.
- Have Crohn's disease or celiac disease, since chronic diarrhea may lower your magnesium levels over time.
How much is too much magnesium per day?
However, by taking supplements, most people get more magnesium than necessary. To avoid an overdose, do not take more than 350 mg of magnesium a day.When is the best time to take magnesium?
Therefore, magnesium supplements can be taken at any time of the day, as long as you're able to take them consistently. For some, taking supplements first thing in the morning may be easiest, while others may find that taking them with dinner or just before bed works well for them.Does magnesium interact with any medications?
It is also important to note that magnesium supplements can interact with other medications, and some medications are already high in magnesium (some antacids and laxatives), so always check with your doctor before adding a supplement into your diet.Can magnesium cause joint pain?
The association between magnesium intake and knee pain and function scores was strongest among subjects with low fiber intake. Conclusion: Lower magnesium intake was associated with worse pain and function in knee OA, especially among individuals with low fiber intake.Does magnesium make poop?
Magnesium helps to increase the amount of water in the intestines, which can help with bowel movements. It may be used as a laxative due to these properties, or as a supplement for magnesium deficiency.Which magnesium is best for sleep and anxiety?
Magnesium glycinate is often used for its calming effects to treat anxiety, depression, and insomnia.What food is highest in magnesium?
What foods are high in magnesium?
- Nuts and seeds. Almonds (roasted): 1 ounce = 80 milligrams of magnesium (20% of the recommended dietary allowance). ...
- Legumes. Black beans (boiled): 1/2 cup = 60 milligrams of magnesium (15% RDA). ...
- Fiber-rich whole grains. ...
- Low-fat dairy products. ...
- Greens. ...
- Chocolate. ...
- Water.