Zinc bisglycinate is a form of the compound of zinc and glycine, an amino acid with a simple structure. In English nomenclature you can find the term zinc bisglycinate. The raw material belongs to the forms described as chelates, whose characteristics result from the specific way of binding the metal ion with the surrounding molecules.
Characteristics and context
Interest in such forms is part of the development of coordination chemistry and supplement technology. The most important thing on the label is to distinguish the amount of the entire compound from the amount of zinc only. The milligram value should clearly indicate which one it applies to. The word "chelate" does not automatically mean that all products are of equal quality. The recipe is also informed by the recommended portion, remaining ingredients and the exact specification of the material used.
Meaning and application
The coordination compound includes zinc and an organic part, therefore the mass of the entire material is greater than the content of the element itself. The declaration on the label should distinguish between these values. You cannot compare the number of milligrams of the complex to the number of milligrams of zinc in another product as if they meant the same thing. A similar caution applies to mixtures in which the form of the ingredient is combined with additional technological substances.
In practice
Chemistry of chelates describes a specific method of binding, not a universal category of preparations with identical properties. The name of the form is one of the data, along with the amount in a serving and the full composition. It is worth referring entries regarding digestibility to specific material and appropriate comparisons. The mere fact of the presence of glycine in the name of the compound does not mean a separate, arbitrary portion of the free amino acid. Such distinctions help read the composition of the supplement more precisely.