Many health proponents and juice machine manufacturers claim that juicing makes more nutrients available to the body than simply eating fruits or vegetables in their whole form.
There are also claims that juicing cleanses the body of toxins and allow you to absorb enzymes, which aid in digestion and other metabolic functions.
These claims may or may not be true. It's tough to find credible, unbiased research that proves these claims, but that doesn't mean they aren't true.
One thing is true: When juice is heated, some vitamins and minerals are destroyed. It is necessary to heat juice that is sold commercially in order to kill harmful bacteria.
So even if fresh juice or juicing doesn't cleanse the body of toxins or enhance the body's metabolic function, it does have more nutrients than commercially-prepared juices.
Here's what Dr. Mercola says about the health benefits of juicing.