Sunlight vs. Vitamin D

[This is part 3 of Epidemiology vs. Etiology]

You may have heard there is an epidemic of low vitamin D levels in the U.S.  An estimated 60% of Americans are at a level that has been correlated with increased risk of nearly all chronic diseases, including cancer, heart disease, diabetes, autoimmune diseases, and depression.  My personal belief is that the epidemiology is horribly flawed.  But perhaps not in the way you might think….

As most people know by now, we humans photosynthesize vitamin D in our skin when it is exposed to direct sunlight.  How fast depends on our ethnicity and amount of exposure.  Since I’m light skinned and get a lot of sun in my normal life, it came as a huge surprise when some routine bloodwork I had done about 9 months ago indicated I was “dangerously low.”

My doctor immediately prescribed large doses of vitamin D supplement, but I was convinced that the result was spurious.  Perhaps it was due to …

Will You Die From Cancer?

Use the arrows that appear if you hover over the bottom right of the Prezi.  You may want to expand to full screen first.

All feedback welcome.  If you like this, what subject would you like to see addressed next using Prezi?…

The Most Important TV Show in America

Remember Jamie Oliver’s TED Prize Wish?  Well tonight is the prime time season premiere of his Food Revolution show on ABC.  The Huffington Post called Undercover Boss the most subversive show in America, and I can’t disagree.  But in terms of importance to the future of America (and by extension every country which imports American TV and culture), Food Revolution I can’t imagine a more important show.

It’s not just the lives of individuals who eat crap (which is most of the country, frankly, even though they have no idea how toxic what they are eating is).  It’s the happiness and achievement potential of today’s youth.  It’s the emperor with no clothes at the center of the healthcare debate.  And it’s a lynchpin for economic recovery and sustainability.

Watch the premiere, and spread the word……

TED Prize Wish: Teach Every Child About Food

Should We Tax Poor Nutrition?

I just tweeted on a subject that I suspected would cause a stir, and so it has, I’m moving it here:

RafeFurst: I strongly support a soda tax! RT @mobilediner: check it out:  a Soda Tax? http://amplify.com/u/dvl

coelhobruno: @RafeFurst what about diet soda? Would it be exempt?

RafeFurst: @coelhobruno no diet soda would not b exempt from tax.  Tax should be inversely proportional to total nutritional content.  Spinach = no tax

Lauren Baldwin: I do as well … and while they are at it they should tax fake fruit juice too.

Kevin Dick: I think this would be an interesting experiment. I predict a tax does not cause any measurable decrease in BMI.

Kim Scheinberg: New York has had this under consideration for a year.  Perhaps surprisingly, I’m against it. In theory, people will drink less soda. In reality, it will just be another tax on people who can afford it the least.

Leaving aside the “rights” issues and …

Is Hunger Really a Problem in U.S.?

Given everything I hear about obesity stats in the U.S. and malnutrition in the developing world, the last thing I was expecting to find in my inbox this morning was a plea to join a Facebook cause to help end hunger in America.  Really?

I’m usually not skeptical in this way, and I’m loath to focus on the negative when it comes to philanthropy, but I can’t get these thoughts out of my head and I’d like some perspective from those who are better informed about the alleged U.S. hunger crisis.  In the mean time, here’s my food for thought:…

Great Nutrition Tips

I’ve plugged Dr. Ann before on this blog, but this 13 minute video is definitely worth checking out, esp. during the holidays.  Ignore the marketing and just listen to the information and tips.  The science of nutrition is extremely complex, but there are some well-understood principles that Dr. Ann focuses on.  If you are like me, you have to understand the processes before you will believe something and take action.  I think her book is the best out there as it’s a combination of scientific consensus, practical tips, and easy-to-understand explanations of why the recommendations work.…

Behavior and Emotions as Virus

We’ve talked about obesity as a virus and violence as a virus, both well-supported by the research.  Now there’s happiness as a virus.  Hardly a surprise, but I guess for new paradigms to become the accepted basis for organizing scientific thinking, they first have to become banal.  So let’s bring it on, what’s the next human behavior or emotion that will be featured in a “surprising”study showing a viral etiology?

hat tip: Daniel Horowitz

Is Obesity Contagious?

Science News reports that a 2005 study of obese and normal-weighted people found that “30% of the obese group showed signs of previous adenovirus-36 infection, while only 11 percent of the lean group did”. Recent research showed that the virus induces long-term changes in how stem cells develop, causing some that were slated to form bone cells to turn into fat cells instead. Researchers are quick to point out that you shouldn’t avoid fat people for fear of infection because the infectious phase only lasts a few weeks, and would have ended long before obesity set in.…