L-Tryptophan
supplement · base score 1 · also listed as l-tryptophan, tryptophan
What is it?
L-Tryptophan is a supplement added for a specific benefit. Graded good: a real, recognisable ingredient that adds nutritional value, so it lifts a product’s score.
At a glance
- Category
- supplement
- Grade
- good
- Base score
- 1 (from −1 to 1; higher is better)
- Found in
- 44 products
- Also listed as
- l-tryptophan, tryptophan
Common questions about l-tryptophan
Is L-Tryptophan good for dogs?
Yes, we grade it as a good ingredient: recognisable and nutritionally useful, so it lifts a product’s score. Bear in mind that no single ingredient decides quality; the whole recipe and its balance matter more.
How many UK dog foods contain l-tryptophan?
44 UK products list l-tryptophan as an ingredient in our database. The full list is shown below, sorted by rating.
What else is l-tryptophan called on labels?
Manufacturers list it under several names: l-tryptophan, tryptophan. We match all of these to the same glossary entry when we read a label.
How does Open Dog Food grade l-tryptophan?
We grade it good, our highest grade, reserved for recognisable ingredients that add real nutritional value. Every ingredient is converted to its dry-matter share and scored from our glossary before a recipe gets its 1-100 rating; the full method is on our methodology page.
What is L-Tryptophan in dog food?
L-Tryptophan is an essential amino acid, meaning dogs must obtain it from their diet. It is often added to pet foods because it serves as a building block for protein and certain brain chemicals. If you are considering it for a specific reason, speak to your vet first.
