Tens of millions of Americans take nutritional supplements. New studies allege some pills do not contain what is on the label. Other research indicates consumers may be ingesting too many vitamins. New concerns about dietary supplements.
Jane Goodall has devoted more than 40 years of her life to the study of chimpanzees in Tanzania, and to other projects promoting environmental preservation and world peace. She joins Diane to talk about her work and about a new National Geographic film, "Chimps in Crisis," airing April 14 on MSNBC.
- Jane Goodall primatologist, founder of the Jane Goodall Institute.
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