Chris’s 30 Day Reboot Day 15

Chris’s 30 Day Reboot Day 15

Nutritional Yeast

It’s Day 15 of Chris’s 30 Day Reboot and he’s been fighting off a bit of a head cold. Lowered immunity in long distance runners is not totally uncommon, as this type of exercise can temporarily lower white blood cell count. I’ve recommended he add in some nutritional yeast as it could be beneficial. Below I go into further detail why.

Heavy training (lots of weekly mileage or very long runs) and staying healthy can often become difficult for many athletes to achieve and nutrition is a lot like training. It’s always a good idea to have several tools in your toolbox to pull out and use, but it’s also important to have a good overall plan that you adhere to the majority of the time. So let’s talk about one more nutrition “tool” you can add to the collection – nutritional yeast. Nutritional yeast has been shown in studies to help endurance athletes in their quest for improved fitness and health.  

After long, exhaustive exercise (long runs, high weekly mileage, or more mileage than your body is accustomed to) your white blood cell count tends to go down(1). For anyone that is training for a distance event, or working out hard on a consistent basis, you will likely experience some type of depressed immune function at some point. Cool thing is, there is a way to help counteract this, using nutrition as your tool. The secret lies in the fact that nutritional yeast is a source of beta-glucan, which activates white blood cells. The binding of the beta-glucan to cellular receptors flips white blood cells on and triggers a chain reaction leading to increased immune activity. In addition to increasing the the ability of neutrophils (a type of white blood cell) and macrophages (another type of white blood cell) to engulf and destroy microbes and other foreign cells, the binding stimulates the production of important signaling proteins of the immune system (like IL-1 and IL-2). In one study(2) those who ate  ¾ of teaspoon a day of special type of fiber found in baker’s, brewer’s, and nutritional yeast did not have their white blood cell count go down. This lead researchers to wonder if this would also mean fewer illnesses in endurance athletes. They tested this theory with a study conducted on runners in the Carlsbad Marathon.

The results of the Carlsbad Marathon Study(3) were that the placebo group had a high number of participants who experienced upper respiratory tract infection symptoms. However, runners taking a spoonful of nutritional yeast had half the rate of infection.  Not only that but the group taking the nutritional yeast felt they had increased “vigor” while the placebo group reported feeling just “meh,” (yes, that’s a scientific post-race term ;))

So if you’re interested in trying some for yourself know that nutritional yeast has a flavor that is probably best described as “cheesy,” making it ideal for sprinkling on foods like pasta and potatoes. I personally put in my smoothies as it has a very mild flavor and isn’t noticeable. You can find nutritional yeast in the bulk section of most health food stores. 


From Chris:

30 Day Diet Reboot Day 15

January 15, 2018, 178.8 Pounds, 11.7% Body Fat

Now the hard work begins.


  • The hard work
  • Head cold
  • Under budget
  • Forgetting to eat
  • Almonds

I am at that ½ way point in my plan where I have successfully modified my nutrition and created new habits to support my goals.  I’ve dropped the first 10 or so pounds – “the easy ten” – and now I’ve plateaued.

Change won’t be daily or rapid from here on out.  Change will only be consistent if I am consistent.  At this point I’ve cleaned out my system and gotten the low hanging fruit – so to speak.  Now I’ve hit the hard digging.  But the progress now is real progress not cosmetic progress.

Now I burn fat.  Now I see the weight loss in my belly and other hard to reach spots.  At first you only see it in general, but now you see real change.  You see it in your face.  You see it in the way your clothes fit.  You feel it when you climb the stairs.

I slept in a bit because I’m still fighting a cold.  I was woken up coughing last night a few keep reading







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