What Is Magnesium Citrate?
Magnesium Citrate is a compound consisting of magnesium and citric acid, which is one of the most easily absorbed forms of magnesium.  Magnesium itself is the second most ubiquitous electrolyte in the human body and is an essential dietary mineral. It plays a number of roles in overall health, including: maintaining normal nerve and muscle function, energy metabolism, and the preservation of neurons when they are not firing.  Magnesium deficiencies are commonplace, especially in western diets as grains are poor sources of this mineral â€” 68% of adults in the United States consume below the recommended daily intake of magnesium.  The most common food sources for magnesium are nuts, beans, legumes, leafy greens, and animal tissue. 
Magnesium Citrate Benefits
The main benefit of magnesium citrate over other forms of magnesium is that it is more easily absorbed by the body. Magnesium also offers a range of other benefits:
Magnesium Citrate Powder and Blood Glucose Pressure
Numerous studies show that magnesium can reduce blood pressure and blood glucose.  One study found that magnesium reduced fasting blood glucose after 6 months of magnesium supplementation.  Fasting blood glucose is the blood glucose level experienced after not eating for at least 8 hours, and is typically measured upon waking from sleep. Another study found that when used in conjunction with lifestyle changes, magnesium reduced 24-hour blood pressure. 
Magnesium Citrate and Breathing Improvement
Magnesium can also offer improvements to breathing. Children who took 300mg of magnesium daily were found to have greater bronchial resilience.  One study found that magnesium supplementation improved the amount of resilience that the airway demonstrated in response to methacholine, a choline ester used to diagnose bronchial hyper-reactivity.
Additional Benefits of Magnesium Citrate
One study found that magnesium increased bone mineral density, which can make bones stronger because more mineral content is packed into the bones.  A lone study found that magnesium supplementation significantly improved the time it took to complete triathlon-like testing.  A couple studies have also shown that magnesium can improve sleep quality, especially in the elderly. [11,12]
Magnesium Powder Side Effects
Commonly reported side effects of magnesium citrate supplementation include diarrhea, nausea, vomiting, and stomach cramping.
Magnesium Citrate Dosage
The recommended magnesium powder dosage is 2g daily.