A serving of eight strawberries contains more Vitamin C than an orange. Strawberries are also rich in folate, potassium and fiber. In fact, they contain more insoluble fiber that many other fruits, keeping you fuller for longer. They are second only to plums as the richest fruit in phenolics and antioxidants, being especially high in cancer and heart disease-fighting flavonoids, anthocyanins, ellagic acid, quercetin, catechin and kaempferol.
Harvard researchers found strawberries to have protective qualities for a variety of cancers. A study using an extract from strawberry leaves on leukemia cells found significant cancer-killing activity.
Another study found that strawberry extracts significantly inhibited the growth of both colon and breast cancer cells. Organically cultivated strawberries had a significantly higher antiproliferative effect that the conventionally grown due to their higher antioxidant levels.
Strawberries are associated with playing a role in reducing estrogen-driven cancer as they are rich in ellagic acid, which can function as an estrogen blocker. Freeze-dried strawberries inhibited growth of two types of cervical cancer cells, and esophageal cancer tumor growth.
Eating eight strawberries a day for eight weeks lowered a leading risk factor for heart disease, homocysteine. In a similar study, the same researcher found that those who ate a serving of strawberries a day for four weeks had higher folate levels.
A 2006 study found that the antioxidant fisetin, found in strawberries, was associated with improved memory and mental function, and protection from the onset of Alzheimer's disease. This flavonoid was found to trigger the activation of memory formation processes within the brain, and also enabled better memory storage by forming strong connections between neurons.
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