All bottled juices are Pasteurized, read heated to kill any germs. This heat also kills the live enzymes not to mention how long the juice has sat unrefrigerated in a bottle. Basically compared with fresh it is pretty nutritionally devoid.

It takes all of 5 minutes with an electric citrus juicer ($14 at Kmart) to squeeze all the lemon you need for a day. citric acid being a pretty good preservative you can squeeze enough for a coupla days then refrigerate which will be better than any bottled juice you'll find.

You are doing a cleanse to rid your body of toxins. You want to use the most nutritious lemon juice available since this is your whole source of nutrition and you body depends on this. 5 mins of your time a day to get the best is nothing and really not a valid excuse to not use fresh lemons.

Loosing weight is not the gauge of a succesfull Master-Cleanse since the Master-Cleanse is not a "weightloss diet" primarily. I'm sure you Master-Cleanse was not a waste but you could do yourself a whole lot more good by spending 5 mins a day to make all the juice you need. Tain't rocket Science just plain common sense..................

You said you lost 18lbs on a 10 day MC...were you overweight? Is that why you lost so much?