GLU-Mg is a corrector of Mg deficiencies that acts on the main atom of the chlorophyll molecule and is therefore considered a critical element for plants and enzymes.

In addition to being an integral part of the chlorophyll, magnesium takes part in the reaction of the carboxylase of the photosynthesis, as a co-enzyme in the fixation of CO2.

As a charged bivalent cation, Mg is involved in the cation-anion balance; it is in charge of regulating the pH and adjusting the turgor of plant cells.

Between 5 and 10 % of the magnesium is bound to pectate and constitutes a structural element of cell walls.

The rest of the magnesium, not bound in structures such as chlorophyll and cell walls, is highly mobile inside the plant, and moves easily between old and young tissues and leaves, such as grains, fruits, etc. This is one of the reasons why the visual symptoms of the deficiency of magnesium are always detected first in the oldest leaves. Due to its function in the transfer of energy during the synthesis of starch, if the supply of magnesium is insufficient, the transfer of energy is prevented.

On the other hand, the deficiency of magnesium also inhibits, in the oldest leaves, the degradation of starches, and the main function of energy for tissue growth and storage organs. Consequently, transportation of carbohydrates to highly demanding sites is inhibited if the amount of magnesium in the plant is inadequate. Therefore, a deficiency of magnesium leads to an increase in starches and dry material content in the oldest leaves, together with deficiencies due to the supply of carbohydrates to fruits, grains and, specifically, to roots.

Magnesium is an element of ribosomes and is involved in the synthesis of proteins.