Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 12 · Episode 10 ·
A Spoonful of Roughage
Horizon explores the effect of fibre in diet on the diseases of western world.
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Episode 10 of season 12 of Horizon: “A Spoonful of Roughage”. Aired 1975-04-28. Watch it online free on ZapFlix.