We"re not going to lie to you no one, it seems, is indifferent to this tea. You"ll either love it or hate it. Yerba mate (pronounced yerba mah tey) is native to south america, where it is drunk as a natural stimulant to increase focus and alertness whilst helping with detoxing and weight loss. And it does all this, allegedly, without any side effects. So one for our celebrity customers, then.