Everything you need to start Whole30 in 2019 Video

  • Now Playing: Eating slower could help prevent obesity: Study


  • Now Playing: Justin Bieber’s burrito eating has the Internet buzzing




  • Now Playing: Everything you need to start Whole30 in 2019




  • Now Playing: Celebrity trainer shares how faith informs his approach to fitness and health




  • Now Playing: ‘Bloated Belly Whisperer’ author shares pro tips to fight back bloating




  • Now Playing: How to fight back against holiday weight gain with a 10-minute workout routine




  • Now Playing: Hack Your Happiness: How doing favors for others can make you happier




  • Now Playing: New Jersey surgery center possibly exposed thousands of patients to HIV, hepatitis




  • Now Playing: Hack Your Happiness: How learning gratitude is changing an Illinois middle school




  • Now Playing: Teen dances ‘Nutcracker’ lead after 15-hour surgery




  • Now Playing: Is loophole keeping unfit doctors practicing medicine?




  • Now Playing: Could taking too many selfies give you ‘selfie-wrist?’




  • Now Playing: 19-year-old has miraculous recovery after battling severe scoliosis




  • Now Playing: What is Mad Cow disease?




  • Now Playing: Exploring treatment options for teens addicted to e-cigarettes




  • Now Playing: Veteran who lost both legs in Iraq war finds healing in yoga




  • Now Playing: Girl with cochlear implants gets classroom elf just like her




  • Now Playing: How IVF grants are helping some families afford the gift of life




  • Now Playing: What to know about the new test for breast milk




  • Now Playing: New warning issued on e-cigarettes and young people