what's the most effective herbal supplement?

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for the filipinos...have u noticed the different advertisements about these herbal supplements? there's mx3,pau d'arco, my-marvel taheebo, liveraide, circulan..and so on..im not into this medicine thingy but im just confused which could be the most effective..it might help me and my family for future problems or sickness..so..have you tried any herbal supplement or medicine whatever? what dyou think's the most effective?