Porus® One is a product that’s good for cats’ kidneys.

Porus® One is a selective physical adsorber for the precursors of renal uraemic toxins (= kidney toxins) in the intestine. This adsorber consists of smooth, black, homogeneous globules 0.1–0.3mm in diameter. The surface of the globule has many pores. The size of the pores in Porus® One is designed specifically to adsorb small molecules, but not macromolecules (such as vitamins, for example) or cells. After adsorbing precursors of uraemic toxins, such as indole and p-cresol, Porus® One is fully excreted with the cat’s faeces.

Porus® One is taken orally. Add a 500 mg stick pack to the cat’s food once a day. It is a great advantage that the effect of Porus® One is not compromised by any type of cat food. It can be poured over the cat’s preferred conventional food or a diet food (e.g., kidney diet food). When the cat is fed purely on dry cat food, mixing Porus® One with a small amount of wet food, cat paste or cat jelly and giving it to the cat separately before putting down the dry food is recommended. Simply tear open the top end of the stick pack, empty the contents over the cat food and mix well. Porus® One is suitable for cats of any age or sex.

Indoxyl sulphate, para-cresyl sulphate and other uraemic toxins are the natural degradation products of nutritional proteins and regularly excreted by the cats via their kidneys. When uraemic toxins (= kidney toxins) accumulate in the blood, they put strain on the kidneys, rendering them unable to excrete all of the toxins. As Porus® One binds the precursors of uraemic toxins in the intestine every day, thereby taking on the kidney’s function, long-term use makes good sense.

One pack of Porus® One contains 30 stick packs of 500 mg Renaltec® each. The stick packs are very easy to open and empty: simply tear open the top end of the stick pack, empty the contents over the cat food and mix well.

Porus® One works according to a physical principle. The substance from which Porus® One is produced has a very high and specific capacity for adsorbing small molecular substances, such as the precursors of known kidney toxins (e.g., indole, phenol and p-cresol).

The substance from which Porus® One is produced is known for being able to adsorb these precursors of kidney toxins (= uraemic toxins) right where they arise and then excrete them with the faeces. Porus® One is not resorbed and therefore places no strain on the metabolism. At the same, it is interesting to know that the adsorption surface area of a cat’s daily 500 mg dose of Porus® One is roughly equivalent to that of 3 tennis courts.

Porus® One takes effects only in the gastrointestinal tract. Porus® One works rather like a vacuum cleaner, sweeping up the precursors of uraemic toxins in the intestine. The precursors of uraemic toxins occur naturally when proteins and essential amino acids are broken down by gut bacteria in the intestine. After being resorbed into the liver, these precursors are transformed into the actual uraemic toxins, which then have to be excreted via the kidneys. Uraemic toxins, such as indoxyl sulphate and p-cresyl sulphate, are known to cause direct damage to the kidneys. Adsorbed and excreted with the faeces, these precursors are they are no longer able to produce any uraemic toxins.

Porus® One is not vulnerable to the digestive juices, which means it cannot be opened up or broken down. The globules themselves are far too big to be resorbed. That’s why Porus® One leaves the intestine during defecation.

Porus® One was purposely produced in the form of globules. This serves two important purposes: the one is that the globules do not damage the mucous membrane in the digestive tract and cannot become entangled in the intestinal villi.

The other is that the tiny, globular structure of Porus®One means its surface permits maximum adsorption: a daily 500 mg dose is equivalent in area to 3 tennis courts.

Porus® One consists of small black globules each with a large number of pores on its surface. The globules are produced so that the pores have the precise size required to allow only small molecules to pass through. Such molecules include the precursors of uraemic toxins, such as indole, phenol and p-cresol. They are physically bound inside the globule so that they remain trapped there and are excreted naturally with it. This means that the precursors of uraemic toxins can be bound because their molecules contain certain electrostatic charges, which form a physical bond with Renaltec®, the substance from which Porus® One is produced. There are therefore two selection steps: firstly, the size of the molecule; secondly, its electrostatic charge and ability to bond with Renaltec®.

Porus® One’s pores are too small to allow large molecules, such as vitamins, to pass through. That’s why vitamins cannot be bound and so remain available to the body. Cells, too, cannot be bound by Porus® One.

Porus® One remains in the intestine for approximately 12 to 36 hours depending on the speed of intestinal transit. Exactly when Porus® One is excreted depends on the cat’s intestinal activity.

Porus® One can be applied with any kind of feed (please consider the recommendations for dry feeding!). If the cat gets oral medications, it is recommended to administer Porus® One 2 hours later. Simultaneous application of a P-binder is possible.

For technical reasons, some globules remain on the inside of the stick pack after emptying. The increased weight of the product inside the pack is specifically chosen to ensure that 500 mg can be emptied from it. It will not be a problem for the cat, should you manage to empty the entire contents of the stick so that your cat ingests 500 mg. The fact that Porus® One is electrostatic is a mark of its efficacy and quality.

You don’t have to, but adding the total daily dose from one stick pack to one of your cat’s daily feeds is quite sufficient. We recommend this because thanks to the way the product almost “flows”, it is not easy to dose from the stick pack, and also because the effect is optimal when it is given in ONE go. Thanks to the large adsorption surface area of a daily dose of Porus® One, it adsorbs a sufficient quantity of uraemic precursors in the intestine.

As Porus® One itself is not resorbed, it cannot enter the cat’s bloodstream, where it might have side-effects. An accidentally higher dose will bind more of the uraemic precursors, but that will not harm to the cat

As Porus® One itself is not resorbed, it cannot enter the cat’s bloodstream, where it might have side-effects. An accidentally higher dose will bind more of the uraemic precursors, but that will not harm to the cat.

It is a great advantage that the effect of Porus® One is not compromised by any type of cat food. If the cat eats dry food, a little wet food or cat jelly or paste is needed to bind the globules. To ensure that cats fed of dry food ingest Porus® One, it’s a good idea to mix Porus® One into a small amount of wet food, cat paste of cat jelly and offer it to the cat before putting down its dry food. Make sure your cat always has sufficient fresh water to drink, especially if you feed it on dry food.

Porus® One is 100% Renaltec®, so it contains no other additives, preservatives, sugar or artificial flavourings. The name Renaltec® describes a carbon that has been processed in a special, highly complex and multiply patented way to achieve the following properties: it does not disintegrate in the gastrointestinal tract, it does not pass on any substances, therefore also no carbon, to the cat (which is why the cat’s faeces do not turn black), it has a smooth spherical shape that is gentle on the intestinal villi and does not cause clumping and therefore also causes no digestive problems.  The Renaltec® globules roll, so to speak, through the gastrointestinal tract. What’s more, the patented processing of the carbon ensures that it is spherical in shape with pores of a specific, set size, leading into an inner channel system inside the globules. The charged precursors of uraemic toxins are physically bound inside this inner channel system.

The specific pore size along with the physical binding of toxins give Renaltec® the selectivity that makes sure valuable nutrients remain in the cat’s intestine. The spherical shape in itself not only ensures the globules’ smooth rolling passage through the gastrointestinal tract but also, thanks to their inner channel system, a large adsorption capacity, which in a daily 500 mg dose is equivalent to the size of 3 tennis courts. That inner adsorption surface area is also produced and quality controlled with the greatest of care and precision.

This is what distinguishes Renaltec® from other carbons that are not spherical (pointed needles or rough splinters) and can therefore cause constipation, stomach pain and other digestive problems, and which are also not selective and therefore do not hinder the removal of valuable nutrients from the cat’s intestine, leading to deficits and weight loss when used over a longer period. 

The spherical shape is also the reason for the product’s high capacity for adsorbing the precursors of uraemic toxins mentioned above. Its high adsorption capacity is as exceptional as the specific selectivity of the Renaltec® globules.

Renaltec®, the active ingredient in Porus® One consists exclusively of carbon. Carbon is a ubiquitous element that forms part of many natural cycles. A free-roaming cat will only excrete a few grams of carbon into the environment after its regular dose of Porus® One. As carbon is a naturally occurring element and even used as fertiliser, the risks posed by carbon are negligible. The environmental risks posed by the precursors of uraemic toxins bound into the carbon, such as indole, p-cresol and phenol, are also negligible; all three substances are natural degradation products, especially in carnivores and also in humans. All of the excreted precursors of uraemic toxins, such as indole, p-cresol and phenol, biodegrade 100% within just a few weeks.

The image of 3 tennis courts serves to illustrate the vast surface area of such a small 500 mg portion of Renaltec®. A tennis court is approximately 23 m long and 11 m wide, which is just under260 m². Three tennis courts have a total area of approx. 750 m².

During the extremely complex Renaltec® production process, the surface area inside the globules is greatly increased by the creation of an inner channel system inside the globules. As a result, the globules become thoroughly porous thanks to their extensive network of internal channels. The total pore volume and so-called “inner surface area”, in other words, the surface area available for adsorption – of indole, for example – is measured during quality control following the production of Renaltec®. Renaltec® has a surface area of approx. 1 500m²/g. Our daily dose is 500 mg, i.e., half a gram, which is where the image of the tennis court (= 750 m²) comes from: most people can take more from that than the plain figure 750 m².

However, the vast adsorption surface area is just ONE of the important properties that ensures the effectiveness of Renaltec®. Equally important properties are the product’s small pore size of 2 nm (selectivity), the electrostatic charging in the microchannels inside the Renaltec® globules and the smooth surface that enables the globules to “roll through” the gastrointestinal tract. It is the combined effect of all of these properties that makes our Porus® One such an exceptional product.