The only triple-action kidney support powder for cats. A scoop in every meal helps protect the kidneys from phosphorus, the #1 thing that wears them down. If your pet is a cat, then she'll love it.
75 g tub · 60 scoops · 30-day supply
Try it for a full month. If it does not work out for you and your cat, tell us and we will refund you in full.
Owners describe the same six things over and over. Each one traces back to the same place: her kidneys.
You refill it more than you used to, or she's started sitting by the faucet. Kidneys that are losing filter power can't hold water inside her body the way they should. She pees more, so she drinks more to keep up.
Bigger, heavier clumps mean more pee. More pee means her kidneys are letting water pass straight through instead of pulling it back into her body.
You feel her spine when you pet her, even though she finishes her bowl. When waste the kidneys should clear builds up in her blood, her body gets worse at turning food into muscle, so she burns the muscle she already has.
Not fish breath. A sharp smell, almost like ammonia. That smell is waste her kidneys would normally filter out. When it builds up in her blood, you can smell it on her breath.
The same waste that changes her breath also irritates her stomach. The occasional hairball is normal cat stuff. Vomiting that becomes a pattern is not.
A body running low on water pulls it from wherever it can, and skin and coat pay first. She may also groom less because she feels off.
Your cat was born with every kidney filter she'll ever have, and the ones that wear out never grow back. Age wears them down slowly, but nothing wears them down faster than phosphorus, and it's in every meat-based food she'll ever eat. Everyone who's loved an old cat knows where that road ends. This powder cuts the phosphorus down to an amount her kidneys can manage.
Stir a scoop into her meal. It rides along with dinner.
As the meal digests, the binder grabs the phosphorus in her gut and holds on.
The binder can't be digested, so it carries the phosphorus out in her stool. Nothing to filter, no load on the kidneys.
With a healthier kidney, her energy is back like a kitten. Don't be surprised by 6am hallway sprints.
A small daily scoop of Struts Triple-Action Kidney Support binds dietary phosphorus in the gut, before it gets absorbed. In a published feline study, the chitosan + calcium carbonate pairing supported normal phosphorus levels within 5 weeks of daily use.*
No need for your kitty to change food or diet. Just add our powder and see how she regains her youthful self in weeks.
Dinner is breaking down in her gut, and the chitosan is right there in it, grabbing phosphorus on contact and holding on. She can't digest chitosan itself, so it passes through whole and leaves in the litter box with the phosphorus still attached.
Nearly all standard chitosan is stripped out of leftover shrimp and crab shells with industrial acid baths. Harsh chemicals, and quality that swings with the catch. Ours is grown from oyster mushrooms in a controlled, sustainable process, so every scoop binds like the one before it.
Chitosan grabs phosphorus as the meal digests. Calcium carbonate catches what slips past, locking it in a form her body can't absorb.
Together they pull more phosphorus from each meal than either could alone, and everything they catch leaves in her stool instead of entering her blood.
While the binders are pulling phosphorus out of her meal, EPA and DHA are already at work on the kidney itself, supporting its healthy function and easing blood flow through the filters she still has.
Most kidney supplements do only one job. Struts does both. And the same omega-3 feeds her skin and coat, so if her shine has been fading, this is what brings it back.
Vitamin E is an antioxidant. It helps protect her kidney cells from the daily wear that comes with age.
Ours is the nutrient form, α-tocopheryl succinate, dosed at 12 mg a day.
By the time the binders are working, the bonito has already done its job. Dinner tasted like dinner and the bowl is empty.
Inulin, a plant fiber, carries it all.
The leading vet-sold binder is built on lactose, a milk sugar cats can't digest. Ours is built on inulin instead, so supporting her doesn't have to be a battle, and life is easier for both of you.
No fillers, no mystery blends.
A daily supplement for cats. Mix into food at every meal.
The binder starts working on bowl one. What you see at home builds over the first three months.
Built on the binder mechanism vets have trusted for decades. Rebuilt without the lactose, the shellfish, or the mealtime fights.
Built on the binder mechanism vets have trusted for decades. Rebuilt without the lactose, the shellfish, or the mealtime fights.
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Struts Kidney
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The Others
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Removes phosphorus effectively
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Targets kidney damage at its source
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Key ingredient backed by published research
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Picky eater's favorite
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Goes beyond kidney support
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30-day money-back guarantee
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HOW TO FEED
It comes down to her weight. Mix the scoop into each meal, not split across meals. If she eats once a day, put her full daily amount in that one meal. The bonito flavor means she thinks it's a topper anyway, so there's no fight, and the protection builds with every bowl she finishes.
| Cat weight | Daily scoops |
|---|---|
| Under 8 lbs | 1 scoop per meal |
| 8–12 lbs | 1 scoop per meal, twice a day (2 scoops a day) |
| Over 12 lbs | 1.5 scoops per meal, twice a day (3 scoops a day) |
Plain answers about dosing, timing, safety, and refunds.
It rides along with her food and catches dietary phosphorus in her gut before her body can absorb it, so it exits in her stool instead of entering her blood. Less phosphorus getting in means less for her kidneys to deal with.
Mix a scoop into each wet meal she reliably finishes, morning and evening. If she only eats one real meal a day, put her full daily amount in that meal. The binder catches the phosphorus in the food it's mixed into.
The binder can only catch phosphorus while food is digesting. In an empty gut it has nothing to hold on to. That's why this is a powder that travels with her food and not a capsule you give between meals: a capsule at 2pm does nothing for the dinner she eats at 6.
Yes. The binder works on phosphorus specifically, not on taurine or other amino acids, so a taurine supplement or taurine-fortified food works fine alongside it. If she's on multiple supplements, giving them in the same meal is fine too. When in doubt, run your full supplement list by your vet.
No. It mixes into the food your cat already eats, wet or dry, with no prescription diet to fight over.
The base is real bonito, the dried fish flakes cats lose their minds over, and the powder is fine enough to vanish into wet food. Start with half a scoop mixed in well for the first few days if she's the suspicious type.
The first weeks happen out of sight, in the litter box, where the caught phosphorus leaves with her stool. The number moves next: ask your vet to recheck her phosphorus at the next visit and see it for yourself. Over the first month or two, owners look for smaller litter clumps, a water bowl that empties slower, and her energy climbing back.
It mixes into any food, including renal diets. Binders grab what's in the gut, so if she takes medications, ask your vet whether to give those at a different meal. Already on a phosphorus binder? Check with your vet before stacking two. The formula was developed with veterinary guidance.
Yes. Phosphorus enters with every meat-based meal she'll ever eat, and kidney care is much easier to start early than to catch up on. The daily dose is designed for long-term use in adult cats.
No lactose, no shellfish (our chitosan is grown from fungi, not shrimp or crab), no vitamin C, no vitamin D, no tryptophan, no added sodium, no phosphate-based additives. Every exclusion is deliberate. The full formula with exact amounts is in the “What's inside every scoop” panel above.
One tub holds 75 g of powder, which is 60 scoops (1 scoop = 1.25 g). Under 8 lbs: 1 scoop per meal. 8 to 12 lbs: 1 scoop per meal, 2 meals a day, a 30-day supply. Over 12 lbs: 1.5 scoops per meal, about 20 days, which is what the 2-pack and 3-pack are for. Shelf-stable, no fridge.
Try it for a full month. If you're not happy, email us within 30 days of delivery for a complete refund.