INGREDIENT
L-Tryptophan
An added form of the essential amino acid tryptophan.
Why it turns up in dog food
- The precursor the body uses to make serotonin, which is why it appears in recipes aimed at calm behavior.
An ingredient on its own tells you very little.
What matters is how much of it there is and where it sits in the list. That is why we weigh
the top five rather than reacting to any single name further down.
Back to the wiki
Get told if this changes
RECALL ALERTS ONLY // NO NEWSLETTER // ONE CLICK TO STOP