FrançaisTryptophan
Tryptophan is an essential amino acid: it has to be supplied to animals through their feed in sufficient amounts to cover their requirement. Dietary supply through feed materials can be insufficient; supplementation is then needed.
“L-Tryptophan 98% Feed Grade” is used to supplement feeds in order to meet the digestible tryptophan requirement of animals. It is particularly suitable for young pigs, because it helps to improve feed intake, growth rate and feed efficiency.
1. Higher feed intake
Maximising feed intake is a practical challenge, especially in young pigs and in lactating sows. At both physiological stages, supplementing a deficient diet with tryptophan has been proven to enhance feed intake. This effect should be related to the fact that this amino acid is involved in appetite regulation in animals.
2. Higher growth rate and feed efficiency
Tryptophan supplementation aims at meeting the nutritional requirement of the animal. Recent trials have shown that a dietary Tryptophan : Lysine (Trp:Lys) ratio of 22% optimizes piglet performance. High body weight gain and feed efficiency levels result from the combination of higher feed intake and improved dietary amino acid balance (ideal protein).
3. Performance under poor sanitary conditions
Tryptophan is also involved in the immune response. The activation of the immune system may create a specific requirement. Experiments comparing good and poor environments have shown that the increase in feed intake and growth rate obtained with higher dietary tryptophan contents is higher in a poor sanitary environment. These results emphasize the benefits of upgrading Trp:Lys levels up to 22% in practical farming conditions.
The leaflet here below summarizes the role of tryptophan and the benefits of supplementing feeds with L-Tryptophan.
 |
Download the leaflet in pdf (300 Ko): |
The table below gives a summary of AJINOMOTO EUROLYSINE S.A.S. proposals concerning tryptophan requirements per species and per growth stage when justified. These requirements, in accordance with the concept of the ideal protein, are expressed on a standardized ideal digestible basis with relation to lysine.
|
Poultry |
Pig |
||||
|
Chicken and Turkey |
Layer |
Piglet |
Grower |
Sow |
|
| Tryptophan,% lysine |
17% |
24% |
22% |
18% |
24% |
For further information, please read our technical bulletins. Numerous experimental study results are reported in these documents.
More on "Tryptophan in young pigs : a key nutrient for growth and feed intake"
 |
Download Feed Mix vol.15 no.3 en Pdf (716 Ko): |
As for L-Lysine and L-Threonine, L-Tryptophan supplementation represents a simple, effective and accurate way of adjusting tryptophan content to an animal's requirement, in order to optimize the technico-economic result of production, particularly in situations where feed intake is the main limiting factor for performance. L-Tryptophan supplementation also contributes to better utilization of other amino acids and of the feed in general. In association with L-Lysine and L-Threonine, the use of L-Tryptophan makes it possible to reduce dietary protein content and, as a consequence, to reduce nitrogen excretion from animal husbandry. In piglets, these feeds with increasingly lower protein content are frequently used in order to limit the occurrence of digestive problems.
More on "Low protein diets for piglets"
