It should be. My husband took it for 10 weeks. However, some take it for less period of time, some longer. Some don't take it at all.
>is it OK to have a 2 week break before doing the flush?
This I don't know, because I haven't read about not taking these herbs if you are trying to conceive. All I know is people take the GCG before the flush and are OK.
>while having the break, would you recommend taking apple juice?
Yes. Lots of organic apple juice helps to soften the stones.