Healthy cat with normal kidney function

The cat eats protein on a daily basis, from which uraemic toxins naturally arise.

These are then filtered by the kidneys and excreted in the urine.

Older cat with impaired kidney function

When the cat’s kidneys no longer function as efficiently as before, they filter out fewer uraemic toxins. As a result, the toxins accumulate in the body.

Uraemic toxins remaining in the body cause damage both to the kidneys and other organs, resulting in their impaired efficiency.

Older cats on Porus® One

Porus® One adsorbs the precursors of uraemic toxins while still in the intestine and passes them out via the faeces.

As a result, the toxins do not enter the kidneys and cannot accumulate in the body.

What does Porus® One
consist of?

Porus® One is a product for cats’ kidneys. It consists 100% of Renaltec®.

Renaltec® is pure carbon that is shaped into tiny spheres in a patented production process.

Porus® One is entirely free of preservatives and additives and is not metabolised so that it puts no strain on the cat’s metabolism.

Porus® One is not a powder. It consists of small,
black spheres.

How it works

The spherical structure and smooth surface of Renaltec® are important because they enable the spheres to “roll” through the gastronintestinal tract without sticking to or damaging the mucous membrane. What’s more, the spheres have a very large capacity so that there is space for a very large number of molecules of the uraemic precursors inside each sphere.

That’s why Porus® One is called a high-performance adsorber.

There are miniscule, precisely measured pores on the surface of the spheres, which allow the precursors of uraemic toxins, such as indole, to pass through into the sphere’s interior. Vitamins, vital substances and cells cannot pass through into the interior as they are too big. The precursors of uraemic toxins are electrostatically charged. There is a network of channels inside the Renaltec® spheres. On the surface of these tiny channels, there are corresponding electrostatic charges designed to trap the precursors of uraemic toxins.

Highly selective, two-step action:
Select & Trap

This means that there are two selection steps to ensure that the precursors of uraemic toxins make their way into the interior of the spheres and are bound there.

2 steps



The first selection step consists of the precisely measured pores on the surface of the Renaltec® spheres. Highly selective, these pores allow the precursors of uraemic toxins to enter the inner channel system, but not important nutritional elements.



The second selection step consists of the charges inside the channel system of the Renaltec® spheres, which are shaped to fit and physically bind the molecules of the uraemic toxins.

Evading the kidneys

This way, the precursors of uraemic toxins are trapped and bound inside the intestine by the Renaltec® spheres and ultimately excreted with the cat’s faeces.

The ageing kidneys are now relieved of the strain of excreting the uraemic toxins via the urine.