Contraindications of cranberries and blueberries

This article was endorsed by Montserrat Enrich - Journalist specializing in edible wild plants and plant uses.

When one should not take blueberries or cranberries?

What are blueberries and cranberries  for?

blueberry
Blueberries are great fruits, with very few calories, and they also top the list of foods richest in numerous antioxidants. For example, it far exceeds the resveratrol content of wine.

Blueberries (Vaccinium myrtillus L.) are mainly used in food like any other fruit.

American  cranberries (Vaccinium macrocarpon A.), in addition to being consumed as food, are used as a supplement and as a juice for its powerful antimicrobial and antioxidant properties.

Contraindications of blueberries and cranberries as fruit

As an edible food, they  do not have significant contraindications. The most urgent thing is to avoid the ingestion of these foods in case of people with allergies.

Side effects of eating blueberries or cranberries

The greatest side effect that consumption of these fruits can produce is a slight increase in urine output, since they are highly diuretic and purifying foods.

American cranberry  or blueberry to cure cystitis?

American cranberry
Cranberry extract is one of the most widely used remedies to fight cystitis, even as a prophylactic when they are recurrent

There is research supporting the antibiotic properties of American cranberry  against certain bacteria causing urinary tract infections, which supports that it is recommended in case of recurrent cystitis, as a prophylactic.

On the other hand, blueberries have been traditionally used for the same purpose.

However, the properties of blueberries or cranberries may be insufficient as the only treatment for urine infections, once they have occurred. For this reason it is recommended as an adjunct, along with medical treatment. Treating urine infections only with these fruits  is not recommended because it may be an insufficient remedy.

Danger of buying a bad quality  supplement

Although it is not exactly a contraindication, it is a danger to acquire American cranberry products that do not contain a sufficient amount of active ingredients, since in that case any treatment will be ineffective.

When buying a  supplement of this fruit, read the labels and look for those extracts  that contain between 25 and 35%  of proanthocyanidins.  In juice, this amount translates to 2 liters of juice and in fresh berries, it would be approximately 100-150 mg of blueberries.

In case of infections, it is advisable to accompany other natural antibiotics and diuretics such as onions, garlic, rosemary and ginger.

Are blueberry or  cranberry juices recommended?

They are  not the most recommended way to take them, although they are  not incorrect either.

The only drawback of the juice is that they usually have added sugars and contain mainly water, diluting the fruit to 25% so that the final product does not have as much acidity and roughness.

Properties of American cranberries picture
Properties of American cranberries

punto rojo More information on blueberries and cranberries

Editorial
Written by Editorial Botanical-online team in charge of content writing

17 April, 2020

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Botanical-online is an informative page that describes, among other topics, the traditional uses of plants from a therapeutic point of view. Their descriptions do not replace professional advice. Botanical-online is not responsible for self-medication and recommends consulting with the physician.
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