African Plant ( Hoodia Gordonii Succulent ) May Help Fight Fat

(CBS) Each year, people spend more than $40 billion on products designed to help them slim down. None of them seem to be working very well.

Now along comes hoodia. Never heard of it? Soon it'll be tripping off your tongue, because hoodia is a natural substance that literally takes your appetite away.

It's very different from diet stimulants like Ephedra and Phenfen that are now banned because of dangerous side effects. Hoodia doesn't stimulate at all. Scientists say it fools the brain by making you think you’re full, even if you've eaten just a morsel. Correspondent Lesley Stahl reports.

Hoodia is a bitter-tasting cactus-like plant. 60 Minutes was told that if it wanted to try hoodia, it would have to go to Africa. Why? Because the only place in the world where hoodia grows wild is in the Kalahari Desert of South Africa.

Nigel Crawhall, a linguist and interpreter, hired an experienced tracker named Toppies Kruiper, a local aboriginal Bushman, to help find it. The Bushmen were featured in the movie “The Gods Must Be Crazy.”

Kruiper led 60 Minutes crews out into the desert. Stahl asked him if he ate hoodia. "I really like to eat them when the new rains have come," says Kruiper, speaking through the interpreter. "Then they're really quite delicious."

When we located the plant, Kruiper cut off a stalk that looked like a small spiky pickle, and removed the sharp spines. In the interest of science, Stahl ate it. She described the taste as "a little cucumbery in texture, but not bad."

So how did it work? Stahl says she had no after effects – no funny taste in her mouth, no queasy stomach, and no racing heart. She also wasn't hungry all day, even when she would normally have a pang around mealtime. And, she also had no desire to eat or drink the entire day. "I'd have to say it did work," says Stahl.

Although the West is just discovering hoodia, the Bushmen of the Kalahari have been eating it for a very long time. After all, they have been living off the land in southern Africa for more than 100,000 years.

Some of the Bushmen, like Anna Swartz, still live in old traditional huts, and cook so-called Bush food gathered from the desert the old-fashioned way.

The first scientific investigation of the plant was conducted at South Africa’s national laboratory. Because Bushmen were known to eat hoodia, it was included in a study of indigenous foods.

"What they found was when they fed it to animals, the animals ate it and lost weight," says Dr. Richard Dixey, who heads an English pharmaceutical company called Phytopharm that is trying to develop weight-loss products based on hoodia.

Was hoodia's potential application as an appetite suppressant immediately obvious?

"No, it took them a long time. In fact, the original research was done in the mid 1960s," says Dixey.

It took the South African national laboratory 30 years to isolate and identify the specific appetite-suppressing ingredient in hoodia. When they found it, they applied for a patent and licensed it to Phytopharm.

Phytopharm has spent more than $20 million so far on research, including clinical trials with obese volunteers that have yielded promising results. Subjects given hoodia ended up eating about 1,000 calories a day less than those in the control group. To put that in perspective, the average American man consumes about 2,600 calories a day; a woman about 1,900.

"If you take this compound every day, your wish to eat goes down. And we've seen that very, very dramatically," says Dixey.

But why do you need a patent for a plant? "The patent is on the application of the plant as a weight-loss material. And, of course, the active compounds within the plant. It’s not on the plant itself," says Dixey.

So no one else can use hoodia for weight loss? "As a weight-management product without infringing the patent, that’s correct," says Dixey.

But what does that say about all these weight-loss products that claim to have hoodia in it? Trimspa says its X32 pills contain 75 mg of hoodia. The company is pushing its product with an ad campaign featuring Anna Nicole Smith, even though the FDA has notified Trimspa that it hasn’t demonstrated that the product is safe.

Cont.