Horizon
Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.
Season 28 · Episode 20 ·
Food For Thought
This story by Horizon looks at the expanding and controversial area of "smart drugs".
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Episode 20 of season 28 of Horizon: “Food For Thought”. Aired 1991-06-10. Watch it online free on ZapFlix.