I have been taking magnesium supplements for several years after discovering how helpful it is for muscle relaxation and recovery, as well as restful sleep. Magnesium also helps greatly to prevent the severe nighttime leg cramps that I used to get regularly. As a lifelong athlete, now in my mid-to-late 50s, this can sometimes occur. I like this chelated glycinate form of magnesium, as it is better absorbed by the body and very gentle on the stomach. I have zero adverse effects from these capsules. I also like that the dosage isn't too high, unlike many other supplements. Overdosing can do more harm than good, and people forget that they already get vitamins, minerals, and nutrients from their diet, so they shouldn't be getting 100% or more of the RDA from any supplement to be safe. This is a great magnesium supplement to add to your healthy diet and lifestyle.