Tofu Cat Litter vs. Clay: Which Is Better for Odor Control?

For decades, clumping clay was the standard for cat litter. But newer options, such as tofu, promise to be better for the environment, less dusty, and even more effective at odor control. But if you’ve ever used cat litter that claims to control odor and were still able to smell your cat’s litter box from across the room, you know not all litters live up to their promises.

Tofu cat litter is made from soy fiber and is praised for being lightweight, highly absorbent, and low-dust. Clay litter is typically made from bentonite clay. It's affordable, absorbent, and forms strong clumps. But how do they stack up when it comes to odor control?

In this article, we’ll go over how tofu and clay litter control odor. We’ll also directly compare tofu cat litter vs. clay to find which is best for odor control. 

Here at Tuft & Paw, we’re cat experts. We've spent countless hours determining which litter features are most important to cats and cat parents alike. The information in this article is based on consultations with veterinarians and professional cleaners, online research, and our own experience as cat parents.

How Each Litter Controls Odors: The Science

Tofu litter, also referred to as soy litter, is made with soybean byproducts that are left over from tofu production. This results in a highly absorbent litter that forms strong clumps. Dr. Kathryn Dench, MA, VetMB, and Chief Scientific Advisor at Paw Origins, says that because tofu litter locks away moisture so quickly, it limits the breakdown of urea in your cat's urine into ammonia. In other words, it prevents that unpleasant litter box odor from forming at full intensity. 

Clumping clay litter is made from bentonite clay. In the tofu vs bentonite cat litter debate, bentonite is known for forming tight clumps, while tofu litter stands out for its plant-based absorbency and lower dust levels. As Dr. Dench notes, a good clump acts like a sealed capsule, preventing ammonia from volatilizing into the air. Non-clumping clay litter is made from non-expanding forms of clay, such as attapulgite, diatomite, or zeolite. It acts like a sponge to absorb urine. However, non-clumping clay can develop odors if not changed regularly. Clay also doesn't neutralize litter box odors like plant-based litters do, so some clay cat litters have added fragrances to cover up those smells. However, this can be irritating to both you and your cat’s respiratory systems.

When considering cat litter, it’s also important to think about odor control lifespan, or how frequently cat litter needs to be changed. Because both tofu and clumping clay litters allow you to scoop out dried urine, they require less frequent changes, about once every 2-4 weeks. Non-clumping clay litter needs more frequent changes, about once every 7-10 days. In the debate over natural vs. clay litter odor control, plant-based litters like tofu may have an advantage because their fibers absorb moisture quickly and help reduce odor buildup. 

Tofu Cat Litter vs. Clay: Head-to-Head Odor Comparison

Which wins on odor?

When it comes to tofu litter odor control, many households find it performs as well as — and sometimes better than — clay litter. It has the strongest ammonia absorption, as the plant-based fibers bind around cats’ urine, helping reduce ammonia formation before odors intensify. Tofu is also lower in dust than clay litters, which helps prevent odors from spreading around your home. It also stands out in multi-cat performance and odor control longevity because it is so highly absorbent. 

While all this sounds great in theory, we wanted to check how well tofu litter stood up in real homes. We asked Petya Holevich, a house cleaning expert and supervisor at Fantastic Services, to compare clay litter to tofu litter for odor control.  “I would say from what I’ve seen that tofu cat litter controls odors better than clay litter, especially during cleaning,” says Holevich, pointing to tofu’s ability to neutralize odors. “Clay often only masks the smell, but when it’s moved during scooping, the trapped smell is often released. And it’s often very dusty, which can spread the odour throughout the room. So if your main priority is to be odor-free, the best choice is tofu litter."

Other Factors to Consider

While odor control is important, we know that it isn’t the only factor to consider when choosing cat litter. Some other factors to consider include:

• Safety & health: Tofu is safer for kittens who might eat their litter. It's food-grade and dissolvable, so it reduces the risk of intestinal blockages compared to clay litter. It’s also softer and gentler on paws, which is especially helpful for kittens, older cats, and cats recovering from surgery.

• Dust level: Because clay litter is dustier than tofu litter, it can be more irritating to cats (and humans!) who have respiratory sensitivities. Dr. Dench notes that cats spend a lot of time in close contact with the litter when digging, which can irritate the respiratory tract and eyes. She’s actually seen quite a few cats in clinic with mild respiratory irritation that improved once their owners switched to a lower dust litter.

• Tracking: Cat litters that are prone to tracking can spread odors throughout your home and be messy. Most tofu cat litter is available in pellet form, which doesn’t stick to your cat’s paws or fur and is lower in tracking than clay litters.

• Eco-friendliness: Tofu litter is biodegradable and made from food waste. In contrast, bentonite clay is strip-mined and not biodegradable, so it accumulates in landfills.

• Price comparison: Clay cat litter is typically cheaper upfront. However, tofu cat litter can last longer, which can make prices more comparable.

• Availability: Clay cat litter is easily accessible, available in pet stores and many grocery stores. While tofu cat litter is becoming more widely available, it is more of a specialty item, and usually needs to be purchased from a pet store or online.

• Flushability: Some tofu litter is flushable, provided you have an indoor cat who is fed a commercial food diet and live in an area where flushing is permitted.  This can make cleanups more convenient.

• Cat acceptance: Some cats prefer the texture of clay litter, as it is most similar to sand. However, many cats are able to transition from clay to plant-based litter within 6 days.

Who Should Choose Tofu Cat Litter?

Tofu cat litter can work best for:

• Owners prioritizing low dust

• Eco-conscious cat parents

• Multi-cat households and busy owners

• Households with kittens or cats with respiratory sensitivities

• Those living in an apartment or condo looking for a lightweight cat litter

Who Should Choose Clay Cat Litter?

Clay may suit:

• Budget-conscious cat owners

• Cat owners who want to purchase widely available cat litter

• Fussy cats

• Automatic litter box users, as automatic litter boxes are often designed specifically for clay-style granules

How to Switch from Clay to Tofu Litter

Because cats can be so particular, it’s best to transition from clay to tofu litter gradually. This gives your cat time to adjust at their own pace and reduces the risk of them rejecting the litter. It’s best to transition your cat’s litter at a time when there’s no extra stress in their lives and while everything else about their litter box set-up remains the same, including the location and the box. 

1. Start with a full deep clean of your cat’s litter box and fill it up to its usual depth with the old clay litter. This marks the start of your transition.

2. Whenever you scoop your cat’s litter box and it needs topping up, use the new tofu litter. By gradually topping up with tofu litter, the litter box will contain more tofu litter and less clay litter over time, helping your cat adjust to the change. 

3. If at any time during the transition your cat seems put off by the new litter, stop adding it. Stick with top-ups of your cat’s old clay litter for a couple of days to give them more time to adjust. 

4. Once your cat’s litter box has been fully transitioned to the new tofu litter, you can continue with your litter box routine as usual.

Final Verdict: Tofu Cat Litter vs. Clay – Which Is Better for Odor Control?

For many cat households, tofu litter matches or outperforms clay litter when it comes to odor control. Its highly absorbent plant-based fibers and starches trap moisture quickly, helping reduce ammonia formation before odors can build up. Beyond odor control, tofu litter offers benefits like being lightweight, low-dust, and more eco-friendly.

That said, a high-quality clumping clay litter can still be an effective option, particularly for budget-conscious cat owners or cats that strongly prefer a sand-like texture. Ultimately, the best choice depends on your cat’s preferences, your budget, and which litter features matter most in your home. If you’re thinking about making the switch, check out our list of the Best Tofu Cat Litters to start your search.

Frequently Asked Questions

What is the best tofu litter for odor control?

Tuft & Paw Really Great Cat Litter, Unscented Charcoal is regularly ranked as one of the best tofu cat litters for odor control. It contains activated charcoal, which traps odors, and is extremely low in dust.

Is tofu cat litter better than clay?

Tofu cat litter is often considered safer, less dusty, and more eco-friendly than clay. It has plant-based fibers and starches that trap moisture, which keeps ammonia from forming. 

Is tofu cat litter good?

Yes, tofu cat litter is a good choice for many households. It offers strong odor control, is low in dust, and is environmentally friendly. 

What is the difference between tofu and bentonite cat litter?

Tofu litter is a plant-based, biodegradable litter made from soy. Bentonite cat litter is made from mined clay and is not biodegradable.

Is tofu cat litter good for multi-cat homes?

Yes, tofu litter is a good choice for multi-cat homes. It’s highly absorbent, extremely low dust, and provides good odor management. 

Sources

Frayne, J., Edwards, M., Templeman, J. R., Croney, C. C., MacDonald-Murray, S., Flickinger, E., Verbrugghe, A., & Shoveller, A. K. (2022). The behavioural impact on cats during a transition from a clay-based litter to a plant-based litter. Animals, 12(8), 946. https://doi.org/10.3390/ani12080946 

Siluo, Q. (2026). A comparative analysis of plant‑based cat litter versus traditional mineral (clay) cat litter, focusing on material properties, environmental sustainability, and animal–human health implications. International Journal on Science and Technology, 17(1). https://doi.org/10.71097/IJSAT.v17.i1.10225