Cranberries have a number of health benefits, but cranberry juice cannot help with weight loss. This is in part because of the added sugars present in most cranberry juice drinks.
The most well-known benefit of cranberries is that they help prevent urinary tract infections, also known as UTIs. This is due to the proanthocyanidins found in cranberries, which act as a barrier to prevent bacteria from attaching to the uterine tract lining. There is also some evidence to suggest that the combination of polyphenols in cranberries can help prevent heart disease by preventing buildup in arteries, as stated by Medical News Today.
Like many fruits, cranberries offer the benefits of vitamin C and fiber. Vitamin C supports the immune system and acts as a potent antioxidant, protecting the body against damage from free radicals. Fiber, meanwhile, is crucial for the digestive system and lowers risk of heart disease, stroke, obesity and gastrointestinal diseases. Fiber is helpful in any weight-loss regimen; however, cranberry juice does not contain fiber, which is the pulp of the fruit itself.
Vitamin E and vitamin K are also an important part of cranberries' nutritional profile. Both have anti-inflammatory properties and, like vitamin C, offer protection against free radicals.