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Cranberry

Supplement botanical women's healthgut
Aka: Vaccinium macrocarpon, proanthocyanidins, CranMax, AZO
Brands seen in Singapore: California Gold Nutrition, 21st Century, Natural Factors, AZO, NOW Foods
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Recurrent UTIs in women — reviews put the drop near 25%
Pros & cons
Pros
  • Recurrent UTI risk ~25% lower, sometimes over 30%
  • Generally thought safe taken by mouth
  • FDA has allowed a limited-evidence claim since 2020
Cons
  • Effectiveness still in question — findings inconsistent
  • Processing into tablets or capsules can cut pacs
  • Very large amounts can upset the stomach
Sources
  1. NIH NCCIH — Cranberry (last updated November 2024), What Have We Learned? · read 2026-08-27
    what it says
    “cranberry products may decrease the overall risk of symptomatic, recurrent UTIs in women by 25 percent, and in some cases, by more than 30 percent. However, the effectiveness of cranberry is still in question because of inconsistent findings”
  2. NIH NCCIH — Cranberry (last updated November 2024), What Have We Learned? / What Do We Know About Safety? · read 2026-08-27
    what it says
    “cranberry may assist in preventing symptomatic UTIs in some women, it isn't recommended as a treatment for existing UTIs in any population … People who think they have a UTI should see a health care provider”
  3. NIH NCCIH — Cranberry (last updated November 2024), proanthocyanidins and processing · read 2026-08-27
    what it says
    “the proanthocyanidins (PACs) present in cranberries prevent bacteria from sticking to the bladder wall … Processing cranberries into various products, like tablets or capsules, can reduce the concentration of PACs, which can reduce the potential effectiveness of a product”
  4. NIH NCCIH — Cranberry (last updated November 2024), What Do We Know About Safety? · read 2026-08-27
    what it says
    “Cranberry taken orally … is generally thought to be safe. However, if consumed in very large amounts, cranberry can cause stomach upset and diarrhea, particularly in young children … conflicting evidence about whether cranberry interacts with … warfarin”
  5. NIH NCCIH — Cranberry (last updated November 2024), pregnancy and breastfeeding · read 2026-08-27
    what it says
    “Some studies of the use of cranberry during pregnancy or while breastfeeding suggest it is safe in amounts commonly found in food, but the evidence is not conclusive for use in larger amounts”
  6. NIH NCCIH — Cranberry (last updated November 2024), FDA qualified health claim (2020 letter of enforcement discretion) · read 2026-08-27
    what it says
    “the U.S. Food and Drug Administration has allowed manufacturers to claim on product labels that there is 'limited' evidence that daily consumption of specified amounts of cranberry dietary supplements may reduce the risk of recurrent UTIs in healthy women”
  7. HSA — Health Supplements Guidelines GL-CHPB-3-001 Rev. 020 (January 2026), s3 working definition + clause 4.8 (Tables 4–5 cover vitamins and minerals only) · read 2026-08-27
    what it says
    “a. Vitamins, minerals, amino acids, fatty acids, enzymes, probiotics and other bioactive substances … 4.8 HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5”
  8. HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev. 001 (October 2025), clause 1.3 + Annex A/B · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list [no cranberry or Vaccinium row in Annex A or B]”
  9. iHerb Singapore — 'Cranberry Supplements' category page, default order, 111 results · read 2026-08-27
    what it says
    “California Gold Nutrition, CranMax® LactoBif® Probiotics … 21st Century, Cranberry Plus Probiotic … Natural Factors, CranRich, Cranberry Concentrate … AZO, Cranberry Urinary Health … NOW Foods, Cranberry Caps”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.