How cranberries can be a Christmas cracker for health this festive season |
From festive sauces to brightly coloured juices, cranberries have long been part of our diets. Beyond their tart flavour and seasonal appeal, these red berries are often described as a superfood with several potential health benefits.
Cranberry supplements are promoted as a convenient way to get these benefits without the sugar or sharp taste of the juice. So what does the science actually say about cranberries, and are supplements as effective as eating the fruit?
Cranberries are best known for their role in helping prevent urinary tract infections (UTIs). The fruit contains compounds called proanthocyanidins. These compounds appear to stop bacteria such as E. coli from sticking to the lining of the urinary tract, which is one of the first steps in developing an infection. This explains why cranberry products may help prevent UTIs, although they do not treat infections once bacteria have already attached and multiplied. Research supports cranberry’s preventive role in women who experience recurrent infections and in children, although results vary between studies. One study found both cranberry juice and tablets reduced UTI rates in women, but tablets worked slightly better and were more cost-effective. Both forms reduced antibiotic use compared with placebo.
Cranberries have also been investigated for their effects on heart health. They are rich in antioxidants such as anthocyanins, proanthocyanidins and quercetin. Antioxidants........