Magnesium Bisglycinate is the combination of Magnesium bound to the amino acid, Glycine. Glycine works synergistically alongside many neurotransmitters – like GABA –to promote sleep and speed up the recovery process. It is well-tolerated and well-absorbed, unlike other forms of Magnesium (such as the cheaper, more commonly found Magnesium Oxide). For this reason, it is also far less likely to cause laxative effects or gastrointestinal stress.