With high levels of omega-3, walnuts have been shown to boost your mood, lower cholesterol and make your blood less likely to clot. They are also a good source of manganese, which helps keep your brain and nerves healthy.
Olives are rich in heart-friendly, healthy fats and vitamin E. To add to these benefits, a recent study found that they contain a compound that helps to control metabolism and prevent type 2 diabetes.
Roasted pumpkin seeds
Pumpkin seeds are an excellent source of protein, unsaturated fat and zinc, which is good for your skin and immune system. To roast them at home, spread them out on a baking tray, sprinkle with a little salt and olive oil, and bake for 10 minutes at 180°C.
Popcorn is low in calories, high in fibre and gluten-free. For a festive flavour, thinly spray with rapeseed or olive oil and sprinkle with a cinnamon sugar mix. Use coconut sugar, which is a nutrient-rich natural sweetener.
Just four brazil nuts a day provide more than your recommended intake of selenium, a powerful antioxidant that is thought to decrease the risk of some types of cancer. They taste even better when covered in chocolate. Opt for dark chocolate to boost your antioxidants further.