Vuka-vuka, Zimbabwe's all-natural answer to Viagra, has been processed and sold by George Moyo for decades

BULAWAYO, Zimbabwe (CNN) -- The wonders of Viagra delight couples around the globe, but ask men in Zimbabwe what they think of the impotency-fighting drug, and they tout an alternative remedy: vuka vuka.

Every morning, men line up outside the Bulawayo home of a local healer George Moyo to get their daily dose of vuka vuka, a natural cure African healers have been dispensing for years.

Does it work? Moyo says his 23 children are proof enough for him. Watch this report from CNN's Bob Coen and decide for yourself.

VXtreme streaming video (2:45)