Ash in cat food

Every cat food package must list its ingredients, listed in descending order of mass. According to current standards, the key regulated parameters include fat and protein content, soluble and insoluble carbohydrates (commonly known as dietary fiber), and water. The percentage of minerals, referred to as ash content, is also listed separately.

This is a point that often raises questions among cat owners. It may seem as if ash is added to the food, but this is not the case. The term "ash" in cat food refers to the amount of non-combustible residue that would result from burning 100 grams of food at a temperature of approximately 500°C. This value reflects the mineral content and is an important criterion to consider when choosing the right food for your pet.

What substances contribute to ash content?

All foods contain both organic and inorganic substances. Organic substances include proteins, which serve as building blocks for cells, as well as fats and carbohydrates (their purpose is to provide the body with energy). Minerals include macronutrients (calcium, chlorine, potassium, sulfur, magnesium) and micronutrients (iron, manganese, zinc, phosphorus, iodine, sodium, cobalt, potassium, and copper).

Important to know: Organic compounds are completely burned when a feed sample is burned in a muffle furnace. When inorganic compounds are burned, an unburned residue remains. The percentage of this residue is indicated on the feed label as "ash," "raw ash," or "ash content," and is considered one of its key characteristics.

What foods affect ash content?

Ash content is considered an important benchmark for assessing feed quality. Minerals are present in all ingredients used in diet production, but their amounts can vary significantly. Bone components typically contain the highest mineral content. Therefore, feeds that use meat and bone meal as the main ingredient typically have higher ash content. "Pure" meat ingredients have significantly lower ash content.

Grains and other plant components contain minimal amounts of non-combustible inorganic substances. With a high percentage of plant materials in the finished diet, the ash content of the feed is reduced to minimal levels, although this does not always indicate its high nutritional value.

Ash content standards in feed

According to veterinary experts, the optimal ash content in cat food should be between 5% and 9%. This level is considered acceptable and safe, but assessing the quality of a cat's diet solely by ash content is incorrect. It's equally important to consider the balance of proteins, fats, and other nutrients.

Ash content also depends on the food's presentation. Dry diets always have higher ash content than wet diets. For example, All Cats and Tasty dry foods have a crude ash content of approximately 7–9%.

When choosing food, it's important to consider the pet's age. For older cats, a reduced ash content is recommended, as excess minerals can contribute to the development of urolithiasis. In such cases, low-ash wet and dry foods are preferred. For example, Tasty wet food, which contains no more than 2.5% ash, is suitable for older pets.

Functions of minerals in the body

Although minerals make up only about 4% of the body weight of warm-blooded animals, their role in the body is extremely significant. Inorganic substances are part of the structure of cell membranes, connective tissues, neurons, and hormones. They actively participate in metabolic processes and also act as a buffer, protecting the body's cells from harmful factors.

Micro- and macronutrients serve as connecting links between protein and lipid structures, normalize water balance, and activate the production of enzymes necessary for digestion. They help maintain acid-base balance and support neuromuscular connections. By interacting with vitamins, minerals participate in metabolic processes.

Each of the inorganic elements is responsible for its own spectrum of physiological processes occurring in the body:

• Magnesium is a component of all types of body tissue;
• calcium is one of the elements necessary for the construction of connective tissue;
• sulfur is involved in the synthesis of aminocarboxylic acids;
• phosphorus is a component of nucleic acids;
• Manganese plays an important role in the formation of bone tissue;
• zinc, copper and selenium are required for the functioning of the immune system and reproductive organs, cell regeneration;
• Sodium, chlorine and potassium, which are found in the blood and lymph, are needed to maintain osmotic pressure in them.

Ash content standards in feed

Dry pet food typically has higher ash content than wet food. According to veterinary standards, the optimal ash content for cat food is 6-7%.

Caution! Ash levels above the recommended limit indirectly indicate the presence of low-quality by-products (such as meat and bone meal) in the food. Using such food may negatively impact your cat's health. Ash levels below the recommended limit indicate a lack of essential micronutrients.

Today, premium cat food is produced using high-quality fresh meat, rich in macro- and micronutrients. The ash content in such foods is within the norm, but quite high. Plant-based and grain-based ingredients have lower mineral content, so grain- and plant-based foods will have a relatively low ash content.

For neutered cats, it's recommended to purchase food with slightly lower ash content. Veterinarians also recommend feeding animals diagnosed with struvite urolithiasis or kidney disease. Cats with these conditions have urine with a pH above 7.5, and mineral salts crystallize and precipitate more readily in an alkaline environment than in an acidic one.

Don't forget about your cat's drinking regimen. Drinking enough fresh water can lead to excess potassium, sodium, and phosphorus, the salts of which can form in the kidneys or insoluble conglomerates (stones) in the bladder will be quickly excreted with urine.

Read also:

• Is dry food harmful to cats?
• Canned cat food
• GMOs and organic foods in pet food