According to the Canadian Journal of Microbiology (31 [1985],
50-53), bentonite can absorb pathogenic viruses, aflatoxin (a mold),
and pesticides and herbicides including Paraquat and Roundup. The clay
is eventually eliminated from the body with the toxins bound to its
multiple surfaces.

http://www.rencodirect.com/calciumbentoniteclay.html 
It's not every nature product that gets tested and approved by NASA.
That's right! NASA gives Calcium Bentonite to its astronauts to
fight osteoporosis caused by weightlessness in space. After much
research they found calcium supplements ineffective, but clay worked! Read what the LA
Times had to say!
During the Balkan War of 1910, Calcium Bentonite Clay was used to
reduce the mortality rate among the soldiers from cholera from sixty to
three percent. Read independent research
articles on calcium bentonite clay for a wealth of information.

This clay deposit near Death Valley was sealed away and isolated
from natural elements by a cap of zeolite minerals for forty-three
million years. Because its adsorptive properties have not been
compromised by air or ground water contaminants, this highly charged,
100% naturally pure Calcium Bentonite Clay has drawing power that is
unsurpassed by any other known clay. Its extremely strong adsorptive
properties make it ideal for use in deep cleansing and clarifying of
the skin, treatment of skin conditions, rashes, burns and other
external injuries, and total body detoxification. You can't buy purer
or more potent healing clay from any other source in the world and,
therefore, it is the ONLY clay we will use in our products. We settle
for nothing less than the BEST for our customers! 
Besides supplying pure raw clay for use in external and internal
detox, Renco Direct specializes in the development of all natural
cosmeceuticals and skin care products containing 100% naturally pure
Calcium Bentonite Clay. All products created by our company are
environmentally friendly to people, animals, and our earth. All of our
products are specially formulated to both nourish and cleanse your body
internally and externally. Read more details about Calcium Bentonite
below.

Watch all Videos, Dicovery Channel, Melissa Rivers etc.