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Depending on what you throw into the blender, smoothies can help your heart, your digestion, boost your brain activity, or even combat cancer. Here are three of the best:

> The Happy Heart: The monounsaturated fats of peanut butter combine with fruit fibre and antioxidants to protect your arteries and boost your heart.

1 banana; I handful of raspberries; 1 tbsp of peanut butter; half cup of fat-free chocolate yogurt; 1/3 litre of skimmed milk

> The Breakfast Booster: Start your day by giving yourself a nutritional boost.

1 banana; 1 peach (cut up); 1/3 litre orange juice; 5 ice cubes

> Brilliant Blueberry: Blueberries can help prevent cataracts, cancer, constipation, and memory loss.

1/3 litre of orange juice;

1 pint of fat-free vanilla yogurt;2 sliced peaches;

2 handfuls of fresh or frozen blueberries