Firstly, your diet is not just there to provide energy – far from it! Your diet does provide energy but what it also does is to provide you with the very building blocks of your body. The amino acids in your diet for instance are used to build muscle, brain tissue, flesh and more. They help us heal from wounds, digest food and create hormones. These are crucial for our optimal performance.

And some aspects of our diet go way beyond this. If you know where to look, then you can find ingredients in your diet that will give you huge surges of energy, that will improve your IQ and that will give you extra strength. You'll avoid illness, look sexier and feel happier, just by changing what you eat.

Which all makes a lot of sense when you remember: this stuff is what you're building yourself from!

On top of this, our diet is also not just a practical consideration. In fact, what we eat is hugely determined by social factors. We eat because we need energy, we eat because we want to but we also eat because we're expected to, because this is the only chance to fit it in and because we want to be social.

If you ignore this aspect of your diet, then you will be destined to fail.

And if all you're interested in is cutting back, then you will probably get ill very quickly!