Mixing the B&P with the lemonade is the worst thing to do if doing the BPs with the MC. Because of the highly absortive nature of the B&P you are negating any of the benefits vitamins and minerals. enzymes etc of the lemonade.
Even when doing the BPs while eating regular you are supposed to do them either one hour before or after taking in any nutrition and or medications.
Read Ptrees famous post in the FAQs to learn how to do the BPs correctly.