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Side Effects of Cranberry You Must Know

Cranberries support health but may cause digestive upset, increase kidney stone risk, or interfere with medications. Avoid processed cranberry products with added sugars and consult your doctor for safe consumption.

  • 05 May 2025
  • 3 min read
  • 14 views

Cranberries are widely known for their benefits, particularly in supporting urinary tract health and providing nutrients and antioxidants. They are generally safe for most individuals, but knowing the side effects of cranberry allows you to make informed decisions about consuming them.
Read on to understand the harmful effects of cranberry.

What are the side effects of cranberry?

Although loved for their health benefits, cranberries also have some drawbacks. Here are the potential side effects of cranberry consumption:

1.     Stomach and gastrointestinal issues

The natural acids and sugars in cranberries may cause bloating, diarrhoea, or abdominal pain. This is more common in people with sensitive stomachs or those with acid reflux and irritable bowel syndrome (IBS). An upset stomach is one of the most commonly reported cranberry disadvantages. Additionally, the tannins in cranberries can have a laxative effect when consumed in large amounts, further contributing to digestive distress.

2.     Increased risk of kidney stones

Cranberries contain a high concentration of oxalates, which can form kidney stones. People prone to kidney stones should control their cranberry consumption to avoid exacerbating the issue. Excessive intake can raise oxalate levels in the urine, increasing the likelihood of stone development.

3.     Interference with medications

Cranberry products, particularly cranberry juice, can interact with certain medications. For instance, they may increase the effects of blood-thinning drugs like warfarin may lead to a higher risk of bleeding. Additionally, they may interfere with certain antibiotics, diabetes medications, and proton pump inhibitors (PPIs), potentially altering their effectiveness. If you are on any medication, consult your doctor before regularly consuming cranberries to minimise potential complications.

4.     Allergic reactions

Although rare, some people may experience an allergic reaction to cranberries. Symptoms may include itching, swelling, or difficulty breathing. Critical symptoms include swelling of the face and difficulty or anaphylaxis. Those with a known allergy to other berries or fruits from the Ericaceae family (such as blueberries) may be at a higher risk. If you notice these signs after consuming cranberries, discontinue their use and seek medical attention immediately.

5.     High sugar content in processed products

While fresh cranberries are nutritious, many cranberry juices and dried cranberry products contain added sugar. Overconsumption of these processed options can lead to weight gain, blood sugar spikes, and different health issues, including metabolic syndrome or type 2 diabetes.

Conclusion

Cranberries offer many health benefits.  However, the side effects of cranberry are the reason you should consume them safely. You must know that stomach issues and potential medication interference are common cranberry disadvantages.  So, make balanced choices and consider your health and conditions before adding cranberries. Also, check your health insurance coverage and consult your doctor to ensure they support your well-being.


Disclaimer: The information provided in this blog is for educational and informational purposes only. It is not intended as a substitute for professional advice, diagnosis, or treatment. Please consult your general physician or another certified medical professional for any questions regarding a medical condition. Relying on any information provided in this blog is solely at your own risk, and ICICI Lombard is not responsible for any effects or consequences resulting from the use of the information shared.

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