Cranberry
Cranberry (Vaccinium macrocarpon) contains proanthocyanidins (PAC) that prevent bacteria from adhering to the urinary tract. Evidence-based for UTI prevention.
What is Cranberry?
Cranberry (Vaccinium macrocarpon) is a small, red berry that grows on low shrubs in moist areas. It is known for its tart flavour and is often used in various foods and beverages. Cranberries have long been popular in health foods and traditional medicine, particularly for their potential health benefits, including their role in preventing urinary tract infections (UTIs).
How does it work in the body?
Cranberries contain a variety of bioactive compounds, including proanthocyanidins (PAC). These compounds prevent bacteria, especially E. coli, from attaching to the mucous membranes of the urinary tract. By inhibiting the adhesion of these bacteria, cranberries may help reduce the risk of UTIs. Additionally, cranberries also have antioxidant properties that can support overall wellbeing.
Scientific benefits
Several studies have investigated the effects of cranberries on urinary tract infections. A meta-analysis published in The American Journal of Clinical Nutrition showed that cranberry extract can reduce the risk of UTIs in women, especially those with a history of recurrent infections. Research has also shown that consuming cranberries may have a positive effect on cardiovascular health by lowering LDL cholesterol and supporting blood pressure.
- Study 1: A study published in the Journal of Urology showed that women who regularly consumed cranberry juice had fewer episodes of UTIs compared with the control group.
- Study 2: Another study in the New England Journal of Medicine demonstrated that cranberry products can reduce the number of UTI episodes in women with recurrent infections.
Dosage and recommendations
To achieve potential health benefits, a daily dose of cranberry juice or capsules containing cranberry extract is often recommended. A general recommendation is to consume 500-1500 mg of cranberry extract daily or drink 240-480 ml of cranberry juice. It is important to choose products without added sugar to maximise health benefits.
Best sources and forms
Cranberries can be found in several forms, including:
- Cranberry juice
- Cranberry extract in capsules or tablets
- Dried cranberries
- Cranberry powder
It is important to select high-quality products from reliable sources to ensure you receive the most effective doses of proanthocyanidins.
Side effects and warnings
Cranberries are generally considered safe for most people when consumed in normal amounts. Some may experience mild side effects such as stomach discomfort or diarrhoea, especially with higher intake of cranberry juice. It is also important to note that cranberries can interact with certain medications, such as blood thinners. Before starting cranberry supplements, you should always consult a doctor, especially if you are pregnant, breastfeeding, or have underlying health conditions.
Frequently asked questions
1. Can cranberries prevent urinary tract infections?
Yes, cranberries contain proanthocyanidins that can prevent bacteria from adhering to the urinary tract, thereby reducing the risk of UTIs.
2. How much cranberry should I consume daily?
It is recommended to consume 500-1500 mg of cranberry extract or 240-480 ml of cranberry juice per day to achieve potential health benefits.
3. Are there any side effects of eating cranberries?
Cranberries are generally safe, but some individuals may experience stomach discomfort or diarrhoea at higher intakes. It is important to consult a doctor if you have any concerns.
4. Can I take cranberries if I am on blood thinners?
Yes, cranberries can interact with blood thinners, so it is important to consult a doctor before starting cranberry supplements.
5. Are cranberries good for the heart?
Yes, research suggests that cranberries may help improve cardiovascular health by lowering LDL cholesterol and supporting blood pressure.