INGREDIENT
Tryptophane
An alternative spelling of tryptophan, an essential amino acid.
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.
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