Animal Nutrition


The main concentration of magnesium in the body is in the skeleton, which contains 60-70% of the total. Despite being present at low levels, magnesium is traditionally classified among the major mineral elements. Magnesium plays a role in maintaining constant physical chemical properties of cells, in ionised form, it regulates calcium and potassium cytosol flow, which is especially important in muscle and cardiac tissue integrity, transfer of nerve impulses and muscle contraction.


Magnesium, an essential element

Magnesium plays a role in energy, protein and lipid metabolism. Deficiency can disrupt some bodily functions.

In adult ruminants, most absorption takes place in the reticulorumen, or in the small intestine for younger animals. Two active mechanisms are involved in magnesium absorption: one is paracellular, the other transcellular.

Feeds usually contain average magnesium content at the limit of recommended levels. Furthermore, the digestibility of organic magnesium is dependent on a number of factors: soil and sub-soil type, climate, how feed is harvested and at what stage. Thus, mineral magnesium supplements are essential.

Magnesium Deficiencies


Hypomagnesium, or grass tetany is a metabolic condition found in dairy cows at the start of lactation or when ruminants are put out to pasture in the spring. The condition is caused by a sudden fall in magnesium concentration in the cerebro-spinal fluid and thus in the blood. Symptoms include a state of neuromuscular excitability with convulsive-type nervous signs. It is often accompanied by hypocalcaemia. There are several kinds of hypomagnesium: grass tetany, winter tetany, infantile tetany, etc. Contributory factors include: dairy cows over 5 years of age, young grass-based feed, climatic conditions, and nitrogen fertilisers.

Furthermore, the presence of elements in the diet (organic and long fatty acids, sulphates, manganese, aluminium, calcium, sodium and potassium) can – in itself, or at high levels – reduce magnesium absorption.

Effects of magnesium oxide supplementation

Preventing the risk of grass tetany depends as much on breeding and feeding practices as it does on agricultural strategy aiming to increase magnesium concentration in feed. Specific magnesium supplementation before and during risk periods can compensate for the fall in feed magnesium digestibility (Meschy et Al, 2010).

Incorporating magnesium in cereal-rich feed reduces the lowering effect of these diets on fat levels and increases fat content in low-fat cows’ milk. Magnesium works by modifying enzyme activity and by concentrating rumen fermentation on acetic and butyric acid, at the expense of propionic acid, thanks to the buffering effect of magnesium.


TIMAB offers a variety of products

Magnesium oxides

Magnesium sulphates

Magnesium carbonate

All of these can be adapted to suit your technical constraints and nutritional requirements.


Our expertise in Animal Nutrition


TIMAB Magnesium is the leading worldwide specialist in magnesium applied to Animal Nutrition. With continual support from its experts and Groupe Roullier R & D, TIMAB Magnesium pursues a constant policy of innovation. Our results are what drives our commitment. These results come from developing increasingly advanced and precise solutions, suited to our customers’ needs.

With its own mining and industrial facilities, TIMAB Magnesium is committed to full traceability and safety of its products.

Its network of partner producers is managed according to ISO & GMP standards to guarantee our customers quality products, selected for their zootechnical and nutritional benefits.

TIMAB Magnesium listens to its customers through its sales teams and technical managers all over the world. Our animal nutrition specialists, trained to meet the challenges raised by industrial and farming issues, provide specialist technical and nutritional solutions. Supported by its global logistics network, TIMAB Magnesium strives to provide its services and advice on a local basis throughout all operating areas.