nutrition
Amino acid profile
Why 'high protein' doesn't mean 'good protein'
A diet can list 32% crude protein and still be deficient in one specific amino acid — often methionine, lysine, or taurine — if the ingredient mix is limited. AAFCO nutrient profiles set minimums for each essential amino acid, which is the actual bar a complete-and-balanced food must clear.
The taurine example
Cats require dietary taurine — a lack of it causes dilated cardiomyopathy and blindness. In dogs, taurine is technically non-essential, but some breeds and some grain-free diets have been linked to taurine-related DCM. This is why 'the amino acid profile' matters more than total protein percentage.
Why it matters
Buying by protein percentage is like buying a car by curb weight. It's a real number that hides everything you actually care about. The AAFCO statement is the shortcut that confirms someone qualified checked the profile.
Frequently asked questions
- How do I check the amino acid profile?
- For most owners, checking that the food carries an AAFCO 'complete and balanced' statement for your pet's life stage is sufficient. For therapeutic or homemade diets, a board-certified veterinary nutritionist runs the analysis.