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Tucking into raw vegetables can boost your brain power, according to new research.

Experts said raw fruit and vegetables are better for mental health than those which are cooked, tinned or processed.

Study leader Dr Tamlin Conner, a psychologist at the University of Otago in New Zealand, said health campaigns traditionally focus on the amount of fruit and vegetables people should eat, such as ‘five a day’.

However, the study, in the journal Frontiers in Psychology, found that, for mental health in particular, the way food is prepared and consumed is also important.

Related article: When healthy fruit and veg can make you ill

Use vegetables in salads, smoothies, blended dressings, and soups. Vegetables can also be pickled or made into noodles. Frozen vegetables that have been blanched or boiled before being frozen are not considered raw. Here are vegetables you can eat raw:

Tomatoes

Carrots

Broccoli

Cauliflower

Brussels sprouts, cabbage

Kale

Eggplant

Red Peppers