The Roundup - Edition 29

The Roundup


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Here is The Roundup, Edition 29, bringing you the best from around the web from the past two weeks!

Blast from the Past

This week, Mark Sisson wrote an article called “Why Some Sun Exposure Will Protect You from Deadly Skin Cancer” which described why the relationship between sun exposure and skin cancer is far more complex than you’ve been led to believe. In fact, much of the research covered in this article suggest that smart sun exposure has beneficial, anti-cancer effects at the skin level, and that the vitamin D produced in response to UV radiation reduces carcinogenicity and induces tumor suppression in skin cells, protecting against deadly melanoma. It’s counterintuitive and goes against conventional wisdom, but more and more evidence supports the belief that regular, safe sun exposure is protective against the most deadly form of skin cancer.

This is something to consider as we (in the Northern Hemisphere) head into summer in the next few months. Don’t save all your sun exposure for your week-long vacation; make sure you’re taking advantage of the warmer weather and increased daylight hours to get some light sun exposure on a regular basis. Building a base tan is actually a healthy practice, compared to avoiding the sun during the week and getting burnt on weekends.

I cover a lot of my summer sun recommendations in an article called Tips for a Healthy Summer, where I describe how smart sun exposure is the most natural way to prevent sunburn or skin damage, and moderation is the key to getting the benefits of sun exposure without overdoing it. It’s smart to start considering getting regular sun exposure now, before you take that weekend beach trip in July and come home looking like a lobster.

For more information about healthy sun exposure, check out the chapter entitled “Go Outside” in my book Your Personal Paleo Code: The 3-Step Plan to Lose Weight, Reverse Disease, and Stay Fit and Healthy for Life (published in paperback as The Paleo Cure in December 2014).

Research Report

  • Growing evidence suggests the bacteria in the digestive tract directly influence the onset of autoimmune disease.
  • Increasing coffee intake is associated with a lower type 2 diabetes risk.
  • Another study highlights the risk of sitting for long periods without taking standing breaks.
  • A new study finds that 25% of Parkinson’s patients have small intestinal bacterial overgrowth (SIBO).
  • Research suggests that snacking increases liver and belly fat more than eating big meals, even when overall caloric intake is the same.
  • This study shows that parental monitoring of children’s media use associated with positive academic, social and physical outcomes
  • More evidence demonstrates that food variety plays a role in overeating and fat gain.

Worth a Look

  • This is a great infographic explaining how to spot bad science.
  • Mark Sisson explains that like any other healthy food we eat, there are caveats and limitations.
  • Ancestralize Me describes 5 common Paleo diet mistakes that you don’t even know you’re making.
  • A fascinating article from Dr. Stephan Guyenet exploring the (trick) question “Does overeating fat or carbohydrate lead to more weight gain?”
  • A new Paleo documentary – “We Love Paleo” – is in production. Donate to the cause here!
  • The New York Times asks: is “cooling down” after exercise really necessary?
  • Listen to my interview with Dr. Kelly Brogan on Fearless Parent radio: The Transformative Power of Nutrition.

For the Foodies

  1. Here is some interesting info

    It has been said that when the sun is 50 degrees above the azimuth then it will produce a certain amount of healthy rays. You can go to a US navel site (don’t remember website) that calculates the azimuth for a particular location for different hours of the day. As it gets closer to 50 degrees, the number of hours of healthy UV sunlight that produces vitamin D decrease. From 50 degrees or less, there is no healthy sunlight,

    In Central Florida where I am, the unhealthy sunlight is from mid October to mid March. I will take vitamin D during this time period to compensate. I swim most of the year. An antioxidant like astaxanthin will have some protect against sun damage. I noticed that since taking it, there is less tanning.

  2. Great articles, but I found the juxtaposition of the infographic on bad science and the headline regarding the study in which subjects were overfed junk food to be entertaining.

  3. What about the artificial tanning booths? It is my understanding that these are not beneficial in this way – can you elaborate on the reality of dangers or non dangers there? I just want to be informed when involved in discussions.

  4. I love your stuff, but you should have the links open up in a new window so we don’t move away from your site. It’s just good business!