I got these for my mom to help her high blood pressure and restless leg syndrome. If she takes these before she goes to sleep, she sleeps better, with less RLS and doesn't wake up with really high BP like she used to all of the time. I'm an ICU nurse and was previously unaware of how important it is to take the right kind of magnesium. There are several different kinds, and the Mag Ox you see everywhere is probably the worst. The Tri Mag has the three that are best for heart health. There is another similar product out there that also has Co-Q 10, which is also excellent for the heart. However, it also has potassium, which you really need to be careful with if you have heart issues. Here is some info I found about the types of mag in this supplement.Magnesium Taurate: Both magnesium and the amino acid taurine share the ability to improve cardiac function; each has a potentiating effect on insulin sensitivity and also a calming effect on neuromuscular excitability. The actions of both have striking similarities when it comes to cardiovascular health. They both have blood pressure reducing effects, stabilize nerve cells, improve the contraction of the heart muscle and have an anti-thrombotic effect. Additionally, low levels of vitamin B6 have been shown to further deplete both magnesium and taurine.Magnesium Malate: This less well-known combination has been studied for use in fibromyalgia. Since malate is a substrate in the cellular energy cycle, it can help improve ATP production; there is some preliminary evidence that it may reduce muscle pain and tender points in fibromyalgia patients.Magnesium Glycinate: Glycine is a well-known calming amino acid. This combination has good bioavailability and does not have a laxative effect since glycine is actively transported through the intestinal wall. Due to the calming and relaxing effect of both glycine and magnesium, this combination has been used successfully for chronic pain and muscle hyper tonicity.