7 Day Vegan Challenge / Going Vegan for 7 Days. Going vegan for 7 days! Six of my friends accepted the vegan challenge and decided to go vegan for a week. Most of them had eaten vegan food, but the though of becoming vegan for 7 days and learning how to go vegan was definitely a challenge, or at least that is what they though. As you will see in this mini vegan documentary, they learn how to shop for vegan food and make vegan meals. They all accepted this vegan challenge and learned about vegan food and that going vegan for 7 days wasn't as bad as they thought. I would definitely say this 7 day vegan challenge was a success for everyone involved. Are you ready to take the vegan challenge?