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Cranberry extract
Quick Facts
- What it is: A concentrated extract from the cranberry fruit, rich in a unique type of plant compound called proanthocyanidins (PACs) that help keep bacteria from sticking to the urinary tract.
- Main uses: Most widely used for preventing recurring urinary tract infections (UTIs), and also studied for heart health and gut microbiome support.
- Best for: Recurring UTIs, Urinary tract health, Gut and heart health support
- Active ingredients: Proanthocyanidins (PACs, type-A linkage), Quercetin, Ursolic acid, Organic acids (quinic acid, citric acid), Anthocyanins, Vitamin C
- Forms: Capsule, Tablet, Softgel, Liquid extract, Powder, Juice concentrate
- Time to effect: UTI prevention benefits can be seen within 4–8 weeks of consistent use; some anti-adhesion effects begin within hours of ingestion.
- Side effects: Generally very well tolerated; mild stomach upset is the most common complaint, and high doses over long periods may slightly raise kidney stone risk in susceptible people.
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What is cranberry extract?
Cranberry extract is a natural ingredient extracted from the juice and flesh of cranberries, which are a type of fruit that are native to North America. This concentrated form of cranberries is often used as a supplement or ingredient in various health products.
How does it work?
Cranberry extract works by preventing harmful bacteria, such as E. coli, from attaching to the bladder and urinary tract walls. This reduces the risk of infections and helps maintain the health of the urinary tract. Cranberries are also high in antioxidants, which help to protect cells from damage and reduce inflammation.
What forms does it come in?
- Capsules
- Tablets
- Liquids
- Powder
- Gummies
First used for medicinal purposes?
The first recorded use of cranberry extract for medicinal purposes was in the 16th century by Native Americans.
Summary:
In conclusion, cranberry extract is a natural ingredient extracted from cranberries, which is known to prevent bacterial adhesion and urinary tract infections. It also helps prevent bladder cancer, kidney stones, and other bladder or urinary tract problems. It is available in various forms, including capsules, tablets, gummies, liquids, and powder form. The recommended daily dose is 500 mg to 1500 mg and can be taken at any time of the day, with or without food. However, it may take several days to take effect and some people may experience side effects like stomach upset, diarrhea, or nausea.
If this is an emergency
Some reactions to Cranberry extract need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Who should avoid Cranberry extract?
- Do not take cranberry extract with warfarin (Coumadin, a blood thinner) unless your doctor says it is safe.
- Stop it and call your doctor if you bruise or bleed more easily than usual.
- Do not take it with atorvastatin (Lipitor, a cholesterol drug) without asking your doctor first.
- Do not take it with nifedipine (Procardia, a blood pressure drug) unless your doctor agrees.
- Do not take it with diclofenac (Voltaren, a pain drug) without checking with your doctor.
- Never add it to drugs cleared by the liver enzymes CYP3A4 or CYP2C9 before a pharmacist checks your list.
- Avoid it if you have had kidney stones, because it can raise oxalate in your urine.
- Do not take it if you are allergic to cranberries, blueberries, or other Vaccinium berries.
- Avoid taking it on an empty stomach, since that makes nausea and heartburn more likely.
- Don't take more than the label dose, because high doses can cause loose stools and gut upset.
- Do not delay medical care if you have a fever, chills, or back pain.
When should you see a doctor?
Stop the extract and call your doctor if you bruise or bleed more easily. Bleeding gums, nosebleeds, or dark stools need a same-day call if you take warfarin. Belly pain or loose stools that will not settle also mean stop and check in.
Get emergency care for hives, a swollen face or throat, or trouble breathing. Call your doctor the same day for fever, chills, side or back pain, or blood in your urine. Those signs need real medical care, not a supplement.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
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