If you're looking for urinary tract support, this product combines two ingredients with some clinical backing — but neither hits a strong dose. The 500 mg of **Cranberry** whole fruit powder falls short of the 36 mg proanthocyanidins (PACs) threshold used in most positive UTI prevention trials, and whole fruit powder is a less concentrated form than standardized extracts.

The probiotic blend delivers 1.2 billion CFU across four strains including **Lactobacillus acidophilus** and **Bifidobacterium bifidum**. That's on the low end — most clinical studies on gut and urinary health use 5–50 billion CFU. You also get 60 mg of **Vitamin C** (as ascorbic acid), which is below the supplemental range but covers your baseline RDA.

For you, the main limitation is potency across the board. Both the cranberry and probiotic doses sit well below what clinical research typically uses for measurable urinary or digestive benefits.

BioStacks
21st Century

Cranberry Plus Probiotic, 60 Tablets

2 Tablets · 30 servings · $0.33/serving

iHerbAmazon

Best for

Digestion

Ingredients (4)

Cranberry

100%

Dose

500 mg

Target

500–1500 mg

Form

—

Probiotic Proprietary BlendLactobacillus acidophilus, Streptococcus thermophilus, Bifidobacterium bifidum, Lactobacillus salivarius

90%

Dose

1.2 B CFU

Target

1–100 B CFU

Form

Standard

Vitamin C

24%

Dose

60 mg

Target

250–2000 mg

Form

Budget

Calcium

110 mg

Trace amount — not scored

Nutrition

Calories, macros & sodium.

  • Calories5
  • Total Carbohydrate—
  • Dietary Fiber—
  • Total Sugars—

Other Ingredients

No other ingredients listed

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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