Magnesium Bisglycinate is a great-tasting powder that can be mixed with water, juice, or with another powdered supplement. Magnesium bisglycinate is an amino acid chelate that binds magnesium to glycine, aiming to reproduce the form in which magnesium is found naturally in food. Studies from the USA suggest good magnesium availability with this chelated form, which also doesn't appear to have any particular drawbacks.