Urinary tract infection prevention
Significantly reduces risk of urinary tract infections and recurrence
Cranberry Extract (Kidney Health)
Concentrated cranberry extract rich in proanthocyanidins specifically supporting kidney and urinary tract health through anti-adhesion mechanisms
Scientific nameVaccinium macrocarpon extract
FormulaRich in proanthocyanidins (PACs)
Molecular weightVariable PAC compounds g/mol
CAS84082-34-8
85
absorption score
8
safety / 10
25
USD per month
5
documented interactions
Check it against something
Cranberry Extract (Kidney Health) with:
- Amylase
- Ashwagandha
- Avocado Oil
- BCAA (Branched-Chain Amino Acids)
- Beetroot Powder
- Beta-Alanine
- Bifidobacterium lactis
- Bifidobacterium longum
- Bovine Collagen
- Caffeine
- Calcium
- Calcium Bone Formula
- Calcium Carbonate
- Casein Protein
- Chicken Collagen
- Choline (Bitartrate)
- Chondroitin Sulfate
- Coconut Oil
- Collagen Peptides
- Comprehensive Immune Support Complex
- Comprehensive Multivitamin-Mineral Complex
- Creatine HCL
- Creatine Monohydrate
- D-Mannose
- DHA
- Electrolyte Blend
- EPA
- Fish Oil (EPA/DHA)
- Folate (5-MTHF)
- Ginger
- Iron Fumarate
- Iron Sulfate
- Joint Mobility Formula
- Keratin
- Krill Oil
- L-Carnitine
- L-Citrulline
- Lactase
- Lactobacillus acidophilus
- Lactobacillus rhamnosus
- Lipase
- Magnesium Citrate
- Magnesium Glycinate
- Magnesium Oxide
- Marine Collagen
- Melatonin
- Modafinil
- Olive Oil Extract
- Omega-3 + Curcumin + Vitamin D Triple Anti-Inflammatory Formula
- Papain
- Protease
- Saccharomyces boulardii
- Turmeric
- Vitamin B12 (Cyanocobalamin)
- Vitamin B12 (Methylcobalamin)
- Vitamin C (Ascorbic Acid)
- Vitamin C (Sodium Ascorbate)
- Vitamin D3
- Whey Protein
- Zinc Gluconate
Nothing found
90
out of 100
Works better together
Compatible. Timing differs, so follow each supplement's own window.
What it does
mechanism and evidence for each claimKidney health and function support
Supports overall kidney health and optimal renal function
Urinary flow and comfort enhancement
Improves urinary flow and reduces urinary discomfort
Antioxidant kidney protection
Provides powerful antioxidant protection for kidney tissue
Bladder health and function
Supports healthy bladder function and reduces irritation
Others take these for the same thing
Same goal, different mechanism — check any of them against this one
Turmeric
Anti-inflammatory & antioxidant
300-1000mg
A
3%
Glutathione
Master antioxidant & detox support
250-750mg
B
20%
Astaxanthin
Superior antioxidant & skin protection
4-12mg
B
20%
SAM-e
Mood support & liver health
400-800mg
A
70%
Plant Collagen
Vegan collagen support & antioxidants
2-5g
C
70%
Quercetin
Immune support & allergy relief
500-1000mg
B
5%
Every pair we checked
12 combinations scored by the engine
Cranberry Extract (Kidney Health) + Caffeine
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Creatine Monohydrate
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Vitamin D3
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Calcium Carbonate
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Whey Protein
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Lactase
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Bovine Collagen
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + DHA
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Turmeric
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Fish Oil (EPA/DHA)
No documented interaction either way
No known interaction
70
Cranberry Extract (Kidney Health) + Lactobacillus acidophilus
Comprehensive urinary tract health support
Works better together
78
Cranberry Extract (Kidney Health) + D-Mannose
Enhanced UTI prevention through complementary mechanisms
Works better together
90
Dosage
Daily500-1500mg
Uti prevention500-1500mg daily (36mg PACs)
Kidney support500-1000mg daily
Urinary comfort500-1000mg daily
Maintenance500mg daily
When to expect it
First Effects1-2 weeks for initial urinary comfort and flow improvements
Peak Benefits4-8 weeks for sustained UTI prevention and kidney health benefits
Deficiency DevelopmentNot applicable - cranberry is not an essential nutrient
Toxicity OnsetRare, mainly kidney stone risk with excessive use
How to measure it
MarkerUrinalysis, urine culture, kidney function markers
OptimalClear urine culture, normal urinalysis, good kidney function
Deficient belowPositive urine cultures, UTI markers present
FrequencyEvery 3-6 months for UTI-prone individuals
What people actually reported to the FDA
CAERS, 2 reports naming it as the suspectMost reported effects
Excluded from the list above: dysphagia (1). Those are people struggling with the tablet itself, not with the compound.
Named as the suspect
2 reports
of 10 that mention it at all
Serious outcome
67%
hospitalisation, emergency room or worse
Other Serious or Important Medical Event2
Visited a Health Care Provider1
Reports are voluntary and unverified — they record what someone experienced while taking something, not what the compound caused. Counts skew towards products people take a lot of, and a serious outcome is more likely to be reported than a mild one, so these are not rates. How we filter them →
What actually reaches you
The label counts the carrier, your body does not
Absorption
Very high 85 of 100 · best absorbed form of this compound
Delivered daily
850 mg
Cost per 100 mg delivered
$0.10 comparative — uses the absorption score, not a measured percentage
Works better with
+
D Mannose
Enhanced UTI prevention through complementary mechanisms
Both prevent bacterial adhesion through different pathways · level B
+
Probiotics
Comprehensive urinary tract health support
Probiotics restore healthy urogenital flora that cranberry protects · level B
+
Adequate Hydration
Enhanced urinary tract flushing and cranberry effectiveness
Proper hydration supports cranberry's anti-adhesion effects · level AWhat not to take with Cranberry Extract (Kidney Health)
!
High Oxalate Foods
May increase kidney stone risk when combined with cranberry
Both cranberry and high-oxalate foods can contribute to oxalate stones · moderate significance
!
Excessive Sugar
High sugar intake may counteract UTI prevention benefits
Sugar can promote bacterial growth in urinary tract · moderate significanceMedication interactions
Discuss these with a pharmacist before combiningMay enhance anticoagulant effects
What to do: Monitor INR levels closely
May increase bleeding risk
What to do: Monitor for bleeding signs
Available forms
Standardized Cranberry Extract (36mg PACs per serving): Strong research, Proven UTI prevention, High bioavailability, Well tolerated
Food sources
Standardized cranberry extract
500-1500mg (36mg PACs) · 85
Pure cranberry juice (unsweetened)
240ml provides ~36mg PACs · 70
Fresh cranberries
1 cup fresh berries · 60
Dried cranberries (unsweetened)
1/4 cup dried berries · 50
Too little
- No deficiency symptoms as cranberry is not essential:
- Increased susceptibility to urinary tract infections
- Recurrent UTIs and urinary discomfort
- Reduced natural urinary tract defense mechanisms
- Higher risk of bacterial adhesion and colonization
- Compromised urinary tract health and function
Too much
- Generally safe with some considerations:
- Increased kidney stone risk with very high doses
- Enhanced blood thinning effects
- Digestive upset with excessive intake
- Generally well tolerated by most people
Who benefits most
recurrent-uti-prevention
Prevention of urinary tract infections and recurrence reduction
500-1500mg daily (36mg PACs)
women-urinary-health
Women's urinary health support and infection prevention
500-1000mg daily
kidney-health-maintenance
General kidney health support and antioxidant protection
500-1000mg daily
elderly-urinary-support
Age-related urinary health support and infection prevention
500-1500mg daily
catheter-users-support
UTI prevention support for catheter users and urinary device users
1000-1500mg dailyWhere to buy it
Look for Cranberry Extract (Kidney Health) at 500-1500mg per serving. The form that matters here is Standardized Cranberry Extract (36mg PACs per serving).
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What else affects it
Beyond other supplements
+
Adequate hydration
Enhanced urinary tract flushing and cranberry effectiveness
Proper hydration supports cranberry's anti-adhesion effects
!
High oxalate foods
May increase kidney stone risk when combined with cranberry
Both cranberry and high-oxalate foods can contribute to oxalate stones
!
Excessive sugar
High sugar intake may counteract UTI prevention benefits
Sugar can promote bacterial growth in urinary tractHow it works
- A-type proanthocyanidins prevent bacterial adhesion to uroepithelial cells
- Anti-adhesion properties specifically target E. coli and other pathogenic bacteria
- Antioxidant compounds protect kidney tissue from oxidative stress and inflammation
- Anti-inflammatory effects reduce urinary tract inflammation and irritation
- Acidification of urine creates less favorable environment for bacterial growth
- Biofilm disruption properties help prevent chronic bacterial colonization
Key findings
what the evidence supports- Extensive clinical evidence for UTI prevention, especially in women
- Strong research on anti-adhesion mechanisms against E. coli
- Good evidence for reducing UTI recurrence rates
- Excellent safety profile with proper dosing
Sources: NIH Examine.com · data reviewed 2026-08-02
Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →
Common questions
What are the benefits of Cranberry Extract (Kidney Health)?
Documented effects: Urinary tract infection prevention; Kidney health and function support; Urinary flow and comfort enhancement; Antioxidant kidney protection. Significantly reduces risk of urinary tract infections and recurrence
How much Cranberry Extract (Kidney Health) should you take per day?
The common daily range is 500-1500mg. By goal — uti prevention: 500-1500mg daily (36mg PACs); kidney support: 500-1000mg daily; urinary comfort: 500-1000mg daily; maintenance: 500mg daily.
When is the best time to take Cranberry Extract (Kidney Health)?
With meals. First effects are typically reported within 1-2 weeks for initial urinary comfort and flow improvements.
What are the side effects of Cranberry Extract (Kidney Health)?
At excessive doses: Generally safe with some considerations:, Increased kidney stone risk with very high doses, Enhanced blood thinning effects, Digestive upset with excessive intake, Generally well tolerated by most people. Safety rating at normal doses is 8 out of 10.
What should you not take with Cranberry Extract (Kidney Health)?
Separate it from High Oxalate Foods, Excessive Sugar by two to four hours. May increase kidney stone risk when combined with cranberry
Does Cranberry Extract (Kidney Health) interact with medications?
Documented interactions with warfarin-blood-thinners, aspirin. Discuss these with a pharmacist before combining.
How do you know if you need Cranberry Extract (Kidney Health)?
The marker is Urinalysis, urine culture, kidney function markers, optimal range Clear urine culture, normal urinalysis, good kidney function. Common deficiency signs: No deficiency symptoms as cranberry is not essential:, Increased susceptibility to urinary tract infections, Recurrent UTIs and urinary discomfort, Reduced natural urinary tract defense mechanisms.