BBC News Report on Hoodia Gordonii
By Tom Mangold - BBC Two's Correspondent
Imagine this: an organic pill that kills the appetite and
attacks obesity. It has no known side-effects, and contains a molecule that
fools your brain into believing you are full. Deep inside the African Kalahari
desert, grows an ugly cactus called the Hoodia. It thrives in extremely high
temperatures, and takes years to mature.
The San Bushmen of the Kalahari, one of the world's oldest
and most primitive tribes, had been eating the Hoodia for thousands of years,
to stave off hunger during long hunting trips.
When South African scientists were routinely testing it,
they discovered the plant contained a previously unknown molecule, which has
since been christened P57. The license was sold to a Cambridgeshire
bio-pharmaceutical company, Phytopharm, who in turn sold the development and
marketing rights to the giant Pfizer Corporation.
A molecule in the cactus makes you feel full. When I
traveled to the Kalahari, I met families of the San bushmen. It is a sad,
impoverished and displaced tribe, still unaware they are sitting on top of a
goldmine. But if the Hoodia works, the 100,000 San strung along the edge of the
Kalahari will become overnight millionaires on royalties negotiated by their
South African lawyer Roger Chennells. And they will need all the help they can
to secure the money.
According to the British Heart Foundation 17% of men and
21% of women are obese, while 46% of men and 32% of women are overweight. So
the drug's marketing potential speaks for itself. Phytopharm's Dr Richard Dixey
explained how P.57 actually works:
"There is a part of your brain, the hypothalamus.
Within that mid-brain there are nerve cells that sense glucose sugar.
"When you eat, blood sugar goes up because of the
food, these cells start firing and now you are full.
What the Hoodia Gordonii seems to contain is a molecule
that is about 10,000 times as active as glucose.
"It goes to the mid-brain and actually makes those
nerve cells fire as if you were full. But you have not eaten. Nor do you want
Dixey organized the first animal trials for Hoodia
Gordonii. Rats, a species that will eat literally anything, stopped eating
When the first human clinical trial was conducted, a
morbidly obese group of people were placed in a "phase 1 unit", a
place as close to prison as it gets.
All the volunteers could do all day was read papers, watch
television, and eat.
Half were given Hoodia Gordonii, half placebo. Fifteen
days later, the Hoodia group had reduced their calorie intake by 1000 a day.
It was a stunning success.
The cactus test
In order to see for ourselves, we drove into the desert,
four hours north of Capetown in search of the cactus.
Once there, we found an unattractive plant which sprouts
about 10 tentacles, and is the size of a long cucumber.
Each tentacle is covered in spikes which need to be
The San will finally throw off thousands of years of
oppression, poverty, social isolation and discrimination Roger Chennells,
lawyer. Inside is a slightly unpleasant-tasting, fleshy plant. At about 1800hrs
I ate about half a banana size - and later so did my cameraman. Soon after, we
began the four hour drive back to Capetown. The plant is said to have a
feel-good almost aphrodisiac quality, and I have to say, we felt good. But more
significantly, we did not even think about food. Our brains really were telling
us we were full. It was a magnificent deception. Dinner time came and went. We
reached our hotel at about midnight and went to bed without food. And the next
day, neither of us wanted nor ate breakfast.