According to Kate Marie and Dr Christopher Thomas, authors of Fast Living Slow Ageing (Mileage Media, $34.95), if you really want to look great, feel fantastic, live longer and ward off age-related disease, you have to make a long-term investment in your health.

This means optimising your nutrient intake and physical and mental activity levels, while avoiding things that accelerate ageing, such as stress, free radicals and inflammation.

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