no, you take it everyday, here, use the search button and type in clen faq, it's by perfectbeast and it will answer alot of your questions, read it through 3x, trust me on the three time thing, you retain much more if you read, think about what you read and think of questions, reread and see if your questions are in there, then do it a third time, and yes it's scientifically proven to work
then post back with questions and we'll help you





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