The Puppy and the Dog They have been man’s companion through the ages and adapted to their owners, but they have their own behavioural and nutritional demands. Knowing and respectingthem will guarantee their health and well-being.

The cat’s feline nature is always a matter of fascination.He adapts with apparent ease to daily life, and yet he has behavioural and nutritional requirements of his own. Knowing them and respecting them will guarantee his well-being and his health.

Because of its composition, a Royal Canin Health Nutrition food provides all essential nutrients measured out with utmost precision in order to contribute every day and on a long-term basis to the well-being and health of every animal, according to his age, his size, his physiological condition and his breed.

Innovation for the sake of dogs and cats’ health. For over 40 years, Royal Canin has worked with breeder partners and veterinary nutritionists to go ever further into innovation and precision to enable us to formulate nutritional solutions which perfectly meet dogs and cats’ real needs.

Home > Health Nutrition > Nutrients > Proteins > Essential amino acids


Arginine, Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine...

The absence in the diet of any of these essential amino acids stops the synthesis of life-sustaining proteins.The animal then uses its natural proteins to synthesise what it needs, which gradually puts its survival in danger.

A little background information

Essential amino acids* cannot be synthesised by the body and must therefore be provided by the food in appropriate quantities.

Its role in the body

Essential amino acids are aptly named, since, without them, the body cannot realise any normal protein synthesis.
The growth of kittens and puppies will be slowed down, while essential functions such as nitrogenous waste elimination and haemoglobin synthesis will be disrupted in adult animals.

Natural sources

Dietary proteins of ‘high biological value’ are those that combine good digestibility and a high content of essential amino acids, such as casein, egg, meat and fish proteins and soy isolates.

*Arginine, Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine,Taurine (cats only), Threonine, Tryptophan, Valine.