Why did you choose magnesium citrate and not magnesium in a chelated form?
Mg citrate is the most bioavailable form per the literature, with statistically significant changes to Mg levels in the blood with supplementation. It has 3 times the absorption rate (bioavailability) compared to other common forms of magnesium supplements. Plus this form has been shown to reduce GI issues as other forms of magnesium may have a laxative effect. Right now, there's not enough evidence to support that supplements in chelated forms are better absorbed than others.