Containing vitamins, minerals, fibre and even Omega-3s, walnuts have been found by researchers to lower cholesterol, regulate appetite and lower blood pressure – not bad going for a snack that will happily live in your desk drawer or rucksack. "They're also very good for your gut health and, along with pecans, they tend to be easier to digest than some other nuts, so produce less gas," says Anna. Try tossing chopped walnuts over leafy salads or granola, or stir them through pasta dishes for an instant nutrient boost.
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