Magnesium is probably one of the most important supplements you can take. If there is only one supplement you take it should be this. I cannot stress enough how important it is for heart health and preventing other diseases including diabetes. 80% of people are deficient in this and the top cardiologists and specialists will tell you that magnesium is one of the biggest predictors of heart health. It has been shown to significantly decrease plaque in the arteries. It also helps lower cholesterol, decreases or eliminates muscle aches, charley horses, helps with sleep, constipation, headaches, etc. In addition, magnesium is crucial to take if you take a calcium supplement because calcium taken without magnesium leads to a magnesium deficiency. Some common symptoms of this are heart problems, palpatations, headaches, insomnia, constipation, and more. It is my favorite vitamin and all my clients love the results from it. Not all magnesium supplements are made the same. The cheaper forms do not absorb very well into the cell (where most magnesium is utilized and stored – which is why a blood test to tell if you are low in magnesium will always be inaccurate.) Magnesium oxide is very poorly absorbed and is not a good source. Magnesium glycinate is gentle on the stomach and is absorbed at a higher rate than most. This form of magnesium also helps people relax more. Some good brands are Solaray Magnesium Glycinate, Doctor’s Best Magnesium Glycinate, Albion and their related brands, and my favorite Klaire Labs Magnesium Glycinate at blueskyvitamins or thenatural.com. Take 400 mg at night or 200 mg a.m. and p.m. During stressful times I always take more of this, up to 1000 mg a day. You can always tell if you have taken too much, because you will have loose stools. So just back the dose down until your stools are not so loose. But take it daily. Some neurologists and cardiologists will put their patients on 1500 mg a day of magnesium. If you have a history of heart disease this is crucial for you to take.