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Vitamin D3, zinc, and polyphenols for UTI prevention

The Complete Formula

D-mannose and cranberry aren’t enough on their own

Three clinically dosed actives that go beyond flushing bacteria — they help prevent it from coming back.

5-in-1
Everything cranberry and d-mannose leave out
Zinc
Supports immune defense against bacteria
Polyphenols
Break down biofilm and calm irritation
Vitamin D3
Strengthens bladder lining and immune defense

THE FORMULA

3 ingredients that complete the protocol

Cranberry blocks adhesion. D-mannose flushes attached bacteria.

UTI prevention is more than mechanical defense. Your bladder wall has to be strong. Your immune system has to respond. Biofilms have to be disrupted.

Vitamin D3 fortifies the urothelial barrier. Zinc activates the macrophages that clear bacterial infections. Polyphenols reduce inflammation and break down biofilms. Together, they're the foundation that lets cranberry and d-mannose do their job.

These are the ingredients other UTI supplements skip to save money.
Dr. Meg, Good Kitty Cofounder
See the research
Cranberry for UTI prevention

Ingredient sourcing matters as much as ingredient choice

Close-up of purple cylindrical capsules on a white background Good Kitty Co
A complete formula isn't optional

Good Kitty delivers what others don’t.

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THE MECHANISM

How Vitamin D3, zinc, and polyphenols protect your bladder

Three actives, three distinct roles in keeping your urinary tract resilient.

01

Fortify

Vitamin D3 strengthens the urothelial barrier by promoting tight junctions between bladder wall cells. A stronger wall means fewer points of bacterial entry.

02

Activate

Zinc picolinate fuels the macrophages — the immune cells that engulf and clear bacterial pathogens. Zinc deficiency is directly linked to increased UTI recurrence.

03

Disrupt

Whole-fruit polyphenols reduce oxidative stress, break down bacterial biofilms, and reduce the inflammatory response associated with UTIs.

How cranberry PACs work in the urinary tract

Based on peer-reviewed research on micronutrient deficiency in recurrent UTI populations and polyphenol-mediated biofilm disruption.

THE RESEARCH

Each ingredient earns its place

Peer-reviewed evidence for the three actives most UTI supplements ignore.

Vitamin D3 fortifies bladder wall

40%lower UTI risk

In vitamin D–sufficient vs deficient women.

Lichenplant-based source

Bioidentical to wool-derived D3 without the animal sourcing.

Zinc activates immune defense

Deficientlinked to recurrence

Zinc deficiency is linked to UTI recurrence.

Picolinatemost bioavailable

Absorbed 3x more efficiently than zinc oxide or sulfate.

Polyphenols disrupt biofilms

Whole fruitfull spectrum

Anthocyanins, flavonols, and phenolic acids working in concert.

Biofilmdisruption confirmed

Polyphenols inhibit bacterial communities that resist antibiotics.

Most UTI supplements skip these. Yours shouldn't.

REAL RESULTS

From women who've tried everything

Verified customer reviews of UTI Biome Shield™.

Read all reviews
I had been on prophylactic antibiotics for almost two years before my doctor suggested I try this. Six months in and not a single UTI.
Sarah M.34, Brooklyn
I've tried every cranberry pill on the market. This is the first one that actually feels different and my recurring issues finally stopped.
Jen K.42, recurring UTIs for 8 years
My urogynecologist recommended it alongside my existing care plan. Easy to take, no weird side effects, and I feel like I finally have control.
Priya R.29, post-honeymoon UTI cycle
Finally something that works!Finally something that works!

“Finally something that works!”

Callie B.

start living UTI-free

UTI Biome Shield™ Starter Kit

Subscribe & Save 15%

Now$84.15(from $99)

  • First delivery includes 60 capsules,
    Canister + Pill Stash ($149 value)
  • Free shipping on every delivery 
  • Ongoing refills are $66.30 each
  • Modify, pause, or cancel anytime
  • 30-day risk free guarantee
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Good Kitty UTI Biome Shield