Comedian Mark Malkoff Takes 28-Day Vegan Challenge

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Comedian Mark Malkoff Takes 28-Day Vegan Challenge

Comedian Mark Malkoff Takes 28-Day Vegan Challenge
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Comedian Mark Malkoff Takes 28-Day Vegan Challenge

by ABC News Videos 2:49 mins

Robert Brace helped Malkoff debunk the myth that it's impossible to gain muscle on a vegan diet.

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