Zinc Histidine (Zinc Histidinate)

Zinc histidinate is a zinc amino-acid chelate in which one zinc ion is coordinated by two L-histidine molecules, supplied as the dihydrate (CAS 17501-65-4; C12H20N6O6Zn, MW 409.72). As a bis-histidine chelate it differs from the bisglycinate and dipicolinate chelates in its ligand, and from the inorganic oxide and sulfate salts. It carries about 16% elemental zinc, among the lower-load zinc forms owing to the two large histidine ligands. It is produced synthetically as a white to off-white powder and manufactured into capsules and tablets.

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