Woman's Own: More anti-flu superfoods
Walnuts
Walnuts are a good source of copper. Even small deficiencies in copper are known to decrease your levels of something called interleukin, which is needed to help the body fight bacterial infections and viruses.
Daily amount: Six.
Best eaten: Anytime, but as a between-meals snack they stave off hunger pangs better than carbohydrates.
Watercress
A natural antibiotic, this peppery leaf is high in beta carotene, vitamin C and iron, and helps maintain oxygen in the blood, which can be compromised during a bout of flu.
Daily amount: A large bunch.
Best eaten: As part of a salad or as a 'tea' tonic (leave to infuse in boiling water for 20 minutes).
Red peppers
One of the true superfoods, a quarter of a red pepper supplies one day's vitamin C requirement. They're also full of immune-boosting bioflavonoids.
Daily amount: 1/4 pepper.
Best eaten: Raw, in salad or lightly cooked on pizzas, stuffed etc.
By Beth Ivory
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