Catuaba bark and Maca are two popular South American herbal remedies known for their potential benefits in enhancing penis size. Catuaba bark has been traditionally used as an aphrodisiac and libido booster in South American indigenous cultures. It is believed to improve blood circulation, which may contribute to firmer and larger erections. Maca, on the other hand, is a root vegetable known for its ability to support hormonal balance and increase energy levels. Some studies suggest that maca may help improve sexual function and stamina, which could indirectly contribute to a more satisfying sexual experience.