Ingredient A-Z

Ash

label termalso called: crude ash, ash content, mineral content

What it is

Not an ingredient that is added to food. Ash is what remains after a food sample is burned away in a lab furnace - the total mineral fraction, including calcium, phosphorus, magnesium, potassium, sodium, and trace minerals. It appears in the guaranteed analysis of many cat foods as a percentage, even though nothing called ash exists in the bag.

Why it gets discussed

Ash percentage is one of the most misread numbers on a cat food label. Owners often read it as filler or burnt material mixed into the recipe. In practice it is simply a measurement of minerals the food already contains, and a moderate ash figure mostly reflects the bone and mineral content of the formula. It is frequently discussed in connection with urinary health, which is veterinary territory - this page describes what the number means, not what any cat should eat.

Where it sits on the label

Listed inside the guaranteed analysis panel, not in the ingredient list. Some brands omit it, in which case the figure can only be obtained by asking the manufacturer.

Foods in our database that do not list it

"Do not list" means the ingredient does not appear on the label text we transcribed for that product. It is not a certification, and recipes change - always confirm on the current packaging.

This page is composition reference material, not advice about feeding your cat. Discuss ingredient-level nutrition questions with your veterinarian.