Thinking of making a new year's resolution to get healthy? Think again!

摘要

As the new year dawned many of us will have resolved to make lifestyle changes to improve our health. This might involve adopting a healthy diet such as getting our "five-a-day", drinking less alcohol, eating less fat and joining a gym to shed a few pounds. Successive governments have encouraged us to adopt these changes for a healthier lifestyle. These are powerful messages, but where do they come from and how reliable is the evidence upon which they are based?