Hive Health Media

Why Are Thin People Not Fat?

A couple of years ago, the BBC aired a documentary on obesity.

But, instead of the typical expose into why Mr. Fatty McButterpants keeps getting heavier and heavier, this documentary took a different approach and investigated the question: Why are thin people not fat?

And here’s what they found:



Doug Robb is a personal trainer, a fitness blogger and author, a competitive athlete, and a student of nutrition and exercise science. He's also the co-founder of the Hive Health Media. Since 2008, Doug has expanded his impact by bringing his real-world experience online via the health & fitness blog – Health Habits.


  1. elle

    August 17, 2011 at 10:13 am

    I was naturally thin as an adolescent and up until I was 21 when I became ill and had to go on prednisone to live. It caused me to gain weight and I’ve had a weight problem every since. The doctor said my metabolism was “ruined” However, according to this documentary my fat cells got bigger. So has my body then adjusted to this bigger size?

  2. Personal Trainer in LA

    February 8, 2011 at 6:21 pm

    I have to admit I had a laugh at the title. The videos are filled with information though. Thanks for sharing!

  3. Jarret

    February 8, 2011 at 3:45 pm

    Hey Doug, great find on this study from the BBC. Not much of a sample size, but it’s interesting that they managed to find volunteers. Some interesting theories regarding the results.

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