Bisglycinate chelate

Chelation is a chemical process in which an organic ligand —here, two molecules of glycine, the smallest amino acid— wraps around the metal ion and locks it inside a stable coordination ring. Because the resulting complex is electrically neutral and low in molecular weight, the mineral travels 'disguised' much like a dipeptide, sidestepping two classic problems of mineral salts: competition for saturable ionic transporters, and the formation of insoluble complexes with dietary phytates and polyphenols.

The isotopic evidence is clearest for magnesium: in patients with ileal resection, absorption from magnesium diglycinate roughly doubled that of magnesium oxide (≈23.5% vs 11.8%), with an earlier enrichment peak consistent with intact uptake via dipeptide transport. For zinc, bisglycinate bioavailability is comparable to or better than inorganic salts and holds up better in the presence of phytic acid.

In longevity protocols, bisglycinate is the preferred form when the goal is to correct a deficiency without digestive side effects: magnesium glycinate for sleep and anxiety, zinc bisglycinate for immunity, and ferrous bisglycinate when iron is needed without constipation. Confirming true mineral status with bloodwork before supplementing is always advisable.