RDA: The Recommended Dietary Allowance (RDA) for adults 19-51+ years is 400-420 mg daily for men and 310-320 mg for women. Pregnancy requires about 350-360 mg daily and lactation, 310-320 mg. UL: The Tolerable Upper Intake Level is the maximum daily intake unlikely to cause harmful effects on health.
When taken in very large amounts (greater than 350 mg daily), magnesium is POSSIBLY UNSAFE. Large doses might cause too much magnesium to build up in the body, causing serious side effects including an irregular heartbeat, low blood pressure, confusion, slowed breathing, coma, and death.
The benefits of magnesium supplementation in healthy individuals aren't clear, but Dr. Nassar says that taking a magnesium supplement every day likely isn't unsafe for most people. Just be sure you're not taking too much magnesium. The maximum dietary allowance for most adults is around 400 mg or less.
There's a chance that taking extremely high doses of magnesium could have some harmful side effects. But as long as you stick to 400 mg or less a day from supplements, you shouldn't have any problems. Taking more than this isn't recommended unless you're under medical supervision.
To avoid an overdose, do not take more than 350 mg of magnesium a day.
Magnesium supplements should be taken with meals. Taking magnesium supplements on an empty stomach may cause diarrhea.
Early signs of excessive magnesium intake can include low blood pressure, facial flushing, depression, urine retention, and fatigue. Eventually, if untreated, these symptoms can worsen and include muscle weakness, difficulty breathing, irregular heartbeat, and even, in very rare cases, cardiac arrest.
Magnesium Dosage, Risks & Potential Side Effects
Recommendations for the proper dosage of magnesium to take before bed vary, and they are often slightly higher for men than women. For the most part, something in the range of 200-350 milligrams is the suggested amount.
A safe magnesium dose ranges from 300 mg to 500 mg. Too much magnesium can lead to loose stools or diarrhea.
You may begin to notice improvements after about a week of supplementation, but do not waiver from your dose as directed. If you are using transdermal magnesium it works instantly due to the quick absorption through the skin, which bypasses the digestive system.
One study, for instance, found that a group of older adults who were given 500 milligrams of magnesium before bed had better sleep quality than participants in the study who were given a placebo. The former group also showed higher levels of melatonin than those in the other group.
One study. View Source of older adults with insomnia found that magnesium supplementation at a dose of 500 milligrams daily for eight weeks helped them fall asleep fast, stay asleep longer, reduced nighttime awakenings, and increased their levels of naturally circulating melatonin.
Magnesium is a vital macro mineral that helps men stay healthy and active. The proper levels of magnesium help protect heart health, reduce the risk of metabolic conditions, improve sleep, increase testosterone levels, and support mental health.
The time of day doesn't matter so much—it's the consistency of taking magnesium daily that matters most. While some recommend taking magnesium supplements right before bed (to calm your mind and nervous system, setting the stage for sleep), do what works best for you to ensure that it becomes a daily healthy habit.
Stress And Anxiety Relief
Magnesium may be the “chill pill” you need. Magnesium plays a role in regulating the hypothalamic-pituitary-adrenal axis (HPA axis), our stress response system, and deficiencies in the mineral have been shown to induce anxiety and HPA axis dysregulation in an animal model.
People with diabetes, intestinal disease, heart disease or kidney disease should not take magnesium before speaking with their health care provider. Overdose. Signs of a magnesium overdose can include nausea, diarrhea, low blood pressure, muscle weakness, and fatigue. At very high doses, magnesium can be fatal.
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.
The good news is that some studies (study links, a and b) have identified how magnesium may ease certain symptoms of stress and anxiety. Here are the facts: Magnesium may help to control the chemical messengers (neurotransmitters) in the brain, resulting in a calming effect on the body.
Magnesium begins to take effect after one week of consistent supplementation.
It's good for cardiovascular health
The article states that an intake of 500mg to 1000mg of magnesium (which is higher than the recommended 300mg-500mg RDA), combined with potassium and reduced sodium intake might lead to a reduction in blood pressure. “Magnesium supports endothelial function,” explains Lee.
A: Thank you for your interest in Nature's Bounty Magnesium 500mg tablets! Our tablets can be cut or crushed with a tablet cutter or crusher and then mixed into your food and/or beverage.