I have never used a Zapper. And have heard it can have ill-effects. Electricity weakens you. Please do more reearch before you use it.
But Liver-Flush is awesome. Start flushing. And Colon cleansing is very important before the LF. Colon cleansing is important so that the toxins released from Liver after the flush are not re-absorbed by the colon.
For that, people recommend enemas, Oxypowder , juicing veggies.
LF should improve the overall health, be it gastric troubles, thyroid disorders, fatigue etc. It may take a 4-5 flushes before the changes come. But its worth the wait.