When did Horizon Season 51 Episode 4 air?
Horizon Season 51 Episode 4 aired on January 29, 2014.


Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.

What's worse for us: sugar or fat? To answer the hottest question in nutrition, twin doctors Chris and Xand Van Tulleken go on month long high-fat and high-sugar diets. The effects on their bodies are shocking and surprising. But they also discover that in the debate about fat and sugar, the real enemy might have been hiding in plain sight.
Direct answers for episode-level questions and details.
Horizon Season 51 Episode 4 aired on January 29, 2014.
This episode runs for approximately 60 minutes.
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