What is threonine feed grade?

Threonine feed grade is a white crystalline powder containing at least 98.5% active agent. It is highly purified and low in dust and volatiles.

Threonine (L-threonine feed) is involved in the formation of natural proteins and is an essential amino acid. L-threonine has an impact on muscle growth and meat production efficiency. It is also one of several possible precursors to the non-essential glycine synthesised in the animal and in this sense threonine plays a role in digestive regulation.


AppearanceWHITE rhomb-shaped crystalline powder
Assay, %≥ 98.50
Specific rotation-26° ~ -29°
Loss on ignition, %≤ 1.0
Ignited residue, %≤ 0.3
Arsenic (As), %≤ 0.0002
Heavy metals (Pb), %≤ 0.0003


Many types of cereals and other feed ingredients are low in threonine and therefore need to be supplemented with threonine to cope with this shortage. This is particularly important when balancing rations based on wheat, barley and sorghum. Threonine is usually the second limiting amino acid in these types of cereals.
Without threonine it would not be possible to maximise feed resources in the pig industry. The addition of pure amino acids to pig diets can reduce protein content and improve feed utilisation without slowing down the growth process. It is generally accepted that if the objective is to minimise fat content (maximise protein concentration) in pigs, the need for amino acids is higher than if the objective is to achieve maximum growth rate and efficiency. In some cases, there is a tendency to increase fat with lower protein rations and amino acid supplements. In poultry, particular attention is paid to reducing protein content by adding amino acid concentrations to ensure maximum replacement of the flock and maximum egg production in laying hens. Such added concentrations also maximise weight gain and feed conversion in broilers. Methionine and lysine are the first and second limiting amino acids for poultry; the addition of threonine to broiler and laying hen feeds already containing methionine and lysine supplements is also effective, particularly in the early stages of growth.
The preparation is introduced into animal feeds, premixes and feed additives in feed mills or on farms. The amount of threonine introduced depends on the type and age of the animal (including poultry) and is determined according to the applicable standards.


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