Mastering Nutrition

Hi, I'm Chris Masterjohn and I have a PhD in Nutritional Sciences. I am an entrepreneur in all things fitness, health, and nutrition. In this show I combine my scientific expertise with my out-of-the-box thinking to translate complex science into new, practical ideas that you can use to help yourself on your journey to vibrant health. This show will allow you to master the science of nutrition and apply it to your own life like a pro.
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Mastering Nutrition



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Now displaying: May, 2016
May 20, 2016

In this episode, I show you how you can determine whether your genetics are contributing to your sensitivity to blue light, poor sleep, and poor daytime alertness, and what you can do about it. Specifically, I look at the research showing that variations in the gene for the vitamin A-dependent protein melanopsin underlie sensitivity to blue light and teach you how to figure out your own genetics for this protein using a 23andMe account (they don't have a health report for it, but the hack around that is easy).

May 11, 2016

In this episode, I answer a listener's question about whether I am worried about my phosphorus intake and whether a high phosphorus intake is ok as long as it is balanced by calcium. I describe the biochemistry and physiology of the system that regulates calcium and phosphorus, their distribution in foods, how to determine the right balance in the diet, and how to use parathyroid hormone (PTH) as a blood measurement to assess whether the dietary balance is working for an individual.

May 4, 2016

In this short episode, I describe how voodoo flossing my computer-damaged wrists has made a tremendous difference in my ability to tolerate weight lifting (especially Olympic lifting) without wrist pain. I use a protocol from Kinetics Sports Rehab that I modify slightly to make my own, which builds on a concept developed by Kelly Starrett of San Francisco CrossFit and MobilityWOD. I don't think you need to lift weights to benefit from this (though I think you should lift weights). I think this is something that has the potential to provide great benefit to anyone who uses a computer a lot. Since it only takes 1-2 minutes per day per wrist, it's worth a shot!

May 3, 2016

In this episode I describe why a set of two yoga blocks has beenone of my best low-cost investments in the last year, playing avariety of unexpected roles around my apartment, and allowing me tomake major strides in increasing the diversity of positions I canwork in to get a healthier level of hip mobility. A standing deskis not enough, and yoga blocks allow me to rest in a squattingposition or sit with greater external rotation in my hips, therebygently challenging the range of motion that sitting so much hastaken its toll on over the years.

May 2, 2016

In this episode, I respond to a listener's question aboutwhether glycation is a good argument against a high-carbohydratediet. I agree that we should avoid refined carbs and emptycalories, but in this episode I describe why "glycation" is reallya misnomer and why carbohydrate is actually likely to protectagainst glycation. Glycation can be driven by the metabolism ofprotein, carbohydrate, and fat. Insulin protects against glycationfrom all three sources, and insulin signaling is strongest aftereating carbohydrate. In fact, glycation may actually serveimportant physiological roles under conditions of low insulinsignaling, so it is important not to view it as an intrinsically"bad" process. Although there are many unknowns, the evidence, evenif relatively weak, suggests that restricting carbohydrate is morelikely to increase glycation rather than decrease it.