To Juice or Not to Juice!

WHICH PART OF FRUITS AND VEGETABLES SHOULD NOT BE JUICED.

"The skins of oranges and grapefruits contain a toxic substace that we don't recommend you drink in large quantities. These skins are also somewhat bitter, so they wouldn't taste good anyway. Apple seeds contain some cyanide, so for that reason we recommend you remove the seeds. Don't juice carrot or rhubarb greens either, again because of the toxicity. Finally the leaves of celery are often bitter, so you may want to remove them." (Juicing for Life)