You can spot a juicer a mile off at the supermarket or greengrocer. Apart from the huge number of carrots and apples they are loading into their trolley, they also have that slightly smug, see-how-healthy-I-am look about them. Or is that just me?! Actually, I don't buy a lot of carrots and apples any more, because (other than my indiscretion with a packet of shortbread this week) I've radically reduced the amount of sugar I take in. My juice of choice is a vegetable one, a green one - but more about that later, first let's ask...

Why is juicing so good?

In my article Enzymes and Raw Food, I explained why eating enzyme-rich food is so important. If you are buying cartons (or bottles) of juice, even many of those labelled 'freshly squeezed' you are almost certainly missing out on the enzymes. Why? Because they are likely to be pasteurised. There are different methods of pasteurisation, but all of them involve heating to temperatures a lot greater than 118F - which is the point at which enzymes are killed.

Fresh juices, on the other hand, are packed with enzymes, vitamins, minerals etc. and they taste a zillion times yummier too. Plus if you invest in a good juicing book, you can select your ingredients based on your immediate health needs too. I recommend Superjuice: Juicing for Healing and Health by Michael van Straten.

Do I need a juicer to juice?

Wel, yes and no. There are so many juicers on the market and the prices vary radically. I always recommend that you start with a mid-priced model that is easy to clean. This is important. If cleaning it is a right old pain, you will be put off using it which is no good at all.

The US market is probably quite different, but for UK readers, I use the Breville AWT JE3 which retails at just under a