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In Defense of Food | Clip | The Secrets of Fiber

Fiber is the part of plant foods that we can't digest. But it provides many benefits to our health, one of which may be the prevention of colon cancer. Fiber feeds bacteria in our colons that produce a protective substance called butyrate. Researcher Stephen O'Keefe found that when he switched people to a high fiber diet, levels of butyrate in the colon increased substantially after only 2 weeks.

S1 E1 | 0:03:24 | AIRED: 12/8/2015 |
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