Are Siberian Cats Hypoallergenic? Read This Before You Believe Anyone

This is the most searched question about the breed in all four of our markets, and almost every page answering it picks a side. The evidence does not support a side. It supports a file. So here is the file, strand by strand, with every number carrying the name of whoever collected it.

The mechanism first: what you are allergic to

Cat allergy is almost never about hair. The main trigger is Fel d 1, a small, stable protein made in a cat's skin, salivary and anal glands and spread onto the fur by grooming. Every cat produces it, Siberians included, and even hairless breeds make it. The protein is built from two chains, encoded by two genes, Ch1 and Ch2. Those two genes are where the entire Siberian claim lives.

Strand one: the academic evidence (real, and tiny)

Exactly one independent genetic study has sequenced Ch1 and Ch2 in Siberian cats: a 2017 University of Turin paper working from FOUR Siberians. It found markedly more mutations in the Siberian samples than in the 35 comparison cats: 13 in Ch1 and 8 in Ch2 found in Siberians only. Its sharpest single result is one cat.

The Siberian with the lowest previously measured saliva reading (0.48 micrograms per millilitre) was also the one carrying two missense mutations found in no other sampled cat. That is a genuinely suggestive genotype-to-reading match, in ONE animal, and the paper itself says the finding needs "further investigations." The other two tested Siberians in the same study read 1.66 and 2.19, which the paper does not flag as unusually low.

Strand two: the breeder-run testing record (large, and conflicted)

The numbers everyone quotes trace to one family operation in Oregon. Since 2003, the Lundbergs (Lundberg Siberians, the cattery) have run saliva and fur allergen testing through Siberian Research and KittenTesting.com. The sites' own copyright notices confirm all three are the same people. Their reported findings span roughly two decades and, by their own counts, several hundred to over a thousand tested cats.

About HALF of Siberians measure substantially lower on Fel d 1 than typical cats. About 15 PERCENT measure low enough for what they call homes with severe allergies. Read that with its three labels attached. It is breeder-collected data from a commercial operation, self-selected rather than randomly sampled.

The 2005 UC Davis collaboration behind the "half lower" headline was never published in any journal; it exists only as the breeder's own description. And the operation's own pages state that its original, still widely used saliva method had "an error rate... 20% in adult cats, and 40% in kittens." Their honesty about the method's limits is to their credit. It is also a reason no one should quote "15 percent" as settled science. The same operation also reports two uncorroborated patterns worth knowing as claims, not facts: silver, smoke and bimetallic lines (which historically involved Persian outcrosses) test high-allergen, and unneutered males test higher until neutered.

What the institutions say (three postures, same question)

TICA's own breed page states, with no caveat, that Siberians "are considered a hypo-allergenic cat breed." CFA's page says nothing about allergies at all. And the allergy establishment rejects the category outright.

The American Academy of Allergy, Asthma and Immunology states "There are no 'hypoallergenic' breeds of dogs or cats." The American College of Allergy, Asthma and Immunology says "studies have not shown that cats can be hypoallergenic." A 2024 independent academic review concludes there is "no scientific evidence for a hypoallergenic cat breed." Even mainstream pet media cannot hold one line: PetMD's Siberian page says the breed is not hypoallergenic while PetMD's own hypoallergenic-breeds listicle says it is, two live pages, one publisher. That instability is exactly why this page shows you the strands instead of a verdict.

The sentence that matters most

No controlled, peer-reviewed study has ever measured Fel d 1 output across a large, randomly sampled Siberian population against a matched control breed. Everything above is either real science on four cats or unaudited testing on many. Both can be true at once. There is probably something real happening at the gene level in some Siberian lines, and nobody has proven it at the population level.

If you are the allergic one, practically

A diet angle exists, worth knowing about with its label. Three peer-reviewed studies show an egg-derived antibody ingredient in cat food measurably reduces active Fel d 1 (in one 105-cat trial, hair allergen fell 47 percent on average by week ten). All three studies are authored and funded by the pet-food company that sells the ingredient, and none tested Siberians specifically.

More practically: spend real time with the specific cat you would bring home, ideally more than once, before committing. One careful cattery's own advice notes that people with cross-reactive allergies often react even to low-allergen Siberians. And a genuine allergy is a medical question for an allergist, never a breed-page decision. For the cat's side of any health worry: something wrong with your cat means call your vet, out of hours an emergency clinic.

Who says what, in one view