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Image: Anna Volobueva/Getty ImagesCranberry juice, with its vibrant red hue and refreshing balance of sweetness and tartness, has remained a beloved drink for generations. It’s a great option to hydrate, whether you're seeking an alternative to water or other fruit juices. But how healthy is cranberry juice really, and what’s the ideal amount to consume? To find out, we spoke with registered dietitians about the benefits of cranberry juice and how to choose the healthiest variety available in stores.
What Is Cranberry Juice?
Cranberry juice is made from the liquid of cranberries, a small, dark red fruit native to North America. The berries are crushed into a pulp, which is then pressed to extract the juice. After that, the juice is filtered and pasteurized before being bottled. Some manufacturers may mix the juice with other fruit juices.
Cranberry Juice Nutritional Information
While cranberry juice can be part of a balanced diet, it doesn't provide much in terms of nutrition. “Juice mainly consists of carbohydrates, with minimal protein and no fat,” says registered dietitian Maddie Pasquariello, MS, RDN. These nutrients are crucial for promoting fullness and slowing digestion, which helps control blood sugar spikes, she explains.
Additionally, many cranberry juice products on the market contain added sugars or may be mixed with other ingredients, making it hard to determine the actual amount of cranberry juice in the beverage, according to Pasquariello.
What Is the Ideal Portion of Cranberry Juice?
Generally, consuming one glass (eight ounces) of cranberry juice daily is considered safe and part of a healthy diet, according to Kristen Carli, MS, RD, a registered dietitian nutritionist and founder of Camelback Nutrition Wellness.
As with all foods and beverages, there is no universal serving size for cranberry juice. The ideal amount varies based on factors such as age, health, and what other foods and drinks you're consuming, especially if you’re mindful of your sugar intake, which is common in many cranberry juice brands, says Carli.
If you're uncertain about the right amount of cranberry juice for you, it's a good idea to consult your doctor or a registered dietitian. They can evaluate your health and lifestyle to recommend the best portion size for you, advises Carli.
Top Health Benefits of Cranberry Juice
It helps to reduce oxidative stress.
To combat oxidative stress in a flavorful way, try drinking cranberry juice. Pasquariello states, “Cranberries contain a class of antioxidants called polyphenols, which include subgroups like phenolic acids, anthocyanins, proanthocyanidins, and flavonoids.” Antioxidants protect the body’s cells from oxidative stress, a process that can gradually damage healthy cells and increase the risk of chronic conditions such as type 2 diabetes, lung disease, and heart disease.
It’s important to note that the antioxidant levels in cranberry juice are not on par with those found in whole cranberries. The juicing process removes the antioxidant-rich skin and seeds, leading to a decrease in antioxidants by approximately 30 to 40%. Cranberry juice blended with other juices may even contain fewer antioxidants, depending on the antioxidant profile of the additional juice. However, this doesn’t mean cranberry juice lacks antioxidant value; it’s just not as potent as whole, fresh cranberries.
It helps with hydration.
When it comes to staying hydrated, plain water isn’t your only choice. Fruit juices, such as cranberry juice, can contribute, thanks to their high water content. This helps increase hydration, which is vital for key bodily functions such as regulating body temperature, supporting digestion, and absorbing nutrients, according to Carli.
It boosts immune function.
Cranberry juice contains compounds such as proanthocyanidins and vitamin C, which are recognized for their role in supporting immune function, explains Carli. Vitamin C is particularly crucial for maintaining optimal immunity, as it is necessary for the production and operation of white blood cells, which are responsible for defending the body against infections by fighting and eliminating germs. Additionally, the antioxidants in cranberries (and thus cranberry juice) possess anti-inflammatory properties, further promoting healthy immune function, according to Pasquariello.
It may help support urinary tract health.
Cranberry juice is most renowned for its potential role in supporting urinary tract health, especially its association with reducing the risk of urinary tract infections (UTIs). UTIs are characterized by symptoms such as a constant need to urinate, pelvic discomfort, or cloudy urine. This benefit is thought to be linked to cranberry juice’s proanthocyanidins, which might prevent harmful bacteria from adhering to the urinary tract walls, potentially lowering the risk of UTIs, says Carli. However, while regularly consuming cranberry juice could theoretically offer some protection, there isn’t sufficient evidence yet to confirm this benefit, and further research is necessary.
In general, staying hydrated by drinking more liquids can help prevent or manage UTIs, notes Pasquariello. Cranberry juice can be a good option if you enjoy it and are looking for a flavorful alternative to water. However, if you’ve already been diagnosed with a UTI, it's essential to complete the prescribed course of antibiotics along with increasing your fluid intake, according to Pasquariello.
It may support heart health.
The antioxidants found in cranberry juice help fight oxidative stress, which may also lower the risk of heart disease. Oxidative stress can damage heart cells, leading to long-term heart function problems. Cranberries and cranberry juice are also rich in flavonoids, a category of antioxidants that may help prevent atherosclerosis, explains Pasquariello. Atherosclerosis occurs when plaque accumulates in the arteries, restricting blood flow and raising the likelihood of heart disease. However, the potential heart health benefits of cranberry juice are based on in vitro studies—conducted in petri dishes or test tubes—so more research is needed to confirm its protective effects for the heart, says Pasquariello.
Potential Risks and Side Effects of Cranberry Juice
Cranberry juice is generally safe for most individuals, but consuming excessive amounts may lead to digestive issues such as stomach upset or diarrhea, warns Carli. This is likely due to its acidic nature and high sugar content.
If you are susceptible to kidney stones, be cautious with cranberry juice, advises Carli. Cranberries contain oxalates, which can contribute to kidney stone formation. Additionally, if you're on blood-thinning medication, cranberry juice could interact with these drugs, so it’s important to consult with your doctor before consuming it, says Carli.
How to Choose the Healthiest Cranberry Juice
When shopping for the healthiest cranberry juice, Pasquariello recommends choosing one made from pure cranberries. Look for labels that say '100% pure cranberry juice' and ensure there are no added sugars in the product.
