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L-lysine for dogs


L-lysine for dogs

L-lysine is an essential amino acid, a building block of protein that dogs cannot make themselves. It has to be taken in with food.

L-lysine » a building block that has to come from outside

Proteins are made up of amino acids. The body can produce some of them itself, but not others. Lysine is one of the essential amino acids. It is abundant in animal protein such as meat, fish, eggs and dairy products, as well as in pulses such as soya.

In cereals, on the other hand, lysine is scarce. There it is the so-called first limiting amino acid: it limits how well the body can use cereal protein as a whole.

Lysine is also a building block of collagen. You can find out more on our page about collagen.

Why heat can make lysine unusable

Lysine has a reactive side group. When protein-rich food is heated strongly together with sugar, this group reacts in the so-called Maillard reaction, the browning reaction that also creates bread crust and the aroma of roast meat. Lysine bound in this way is no longer available to the body.

What L-lysine is valued for in your dog's diet

Lysine is a building block for body protein, for example in the muscles. It is also a component of collagen.

Growing and older dogs have a higher protein requirement. A good supply of essential amino acids such as lysine is then particularly important.

L-form and hydrochloride

Amino acids exist in two mirror-image forms. To build protein, the body uses the L-form, hence the name L-lysine. In complementary feed, it is usually present as L-lysine monohydrochloride, a stable, readily soluble salt form.

Origin and quality

We have worked with the same regular suppliers for many years. Their goods are tested for residues and are additionally examined by independent laboratories before they go into production.

Where we use L-lysine

L-lysine is an ingredient of DOG FIT by PreThis® VITAL regeneration, together with collagen, silica, horsetail and vitamin C.

Frequently asked questions about L-lysine

Our recommendation


DOG FIT by PreThis® VITAL regeneration
From €25.95
4.9 (13)

Collagen, L-lysine plus bioflavonoids for dogs with musculoskeletal issues, such as vertebrae, intervertebral discs, ligaments & fascia.

Content: 60 caps. » 0,021 kg (€1,235.71 / 1 kg)

Heart and paw


Veterinary Expertise at the Heart of Our Team

Dr. Sibylle Ott, MD, veterinarian, plays a central role in our team at DOG FIT by PreThis®. As an experienced veterinarian with naturopathic expertise, she contributes significantly to the development of our products. Her experience and deep understanding of dogs' needs flow into many of the formulas we create. She is a valuable asset to our team and to the well-being of many dogs.

Dr. med. vet. Ott

This content is for information only and does not replace advice from a vet. Our products are complementary feed for dogs. They do not replace a veterinary examination or treatment. If your dog has any health problems, please contact your vet.

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