S2 EPISODE 3 - Vitamin D, Immunity & Supplementation in Athletes w/ Brian St. Pierre

In Season 2 Episode 3, Dr. Bubbs sits down with Brian St. Pierre MS, Director of Performance Nutrition at Precision Nutrition, a world leader in nutrition education and coaching. Brian talks functions of vitamin D in the body, its key role in immunity, how much vitamin D you can get from the sun, if you should supplement with vitamin D, lab values for supporting health and athletic performance, vitamin D rich foods and much more. Fantastic insights from Brian, who also shares his experiences working with elite athletes and trainers around the world.

Lay-Ups in This Episode

  1. Vitamin D is actually more of a pro-hormone (not a vitamin).
  2. The sun is far and away the best source of vitamin D, however some foods like deep-water fatty fish, egg yolks and mushrooms contain modest amounts.
  3. If athletes are insufficient or deficient in vitamin D, they’ll likely see performance gains by achieving sufficiency.

Performance Insights From This Episode

  1. Individuals with darker skin tone may have a lower normal range for vitamin D status.
  2. Sufficient vitamin A status is crucial for optimizing vitamin D usage and avoiding toxicity.
  3. Supplementation of vitamin D in the winter months, in modest doses, is likely warranted in most people living in northern latitudes.

The “Big Rocks” – Bryan’s Tip

Master the fundamentals.

About Brian St. Pierre MS

Director of Performance Nutrition at Precision Nutrition, working with a host of professional sports teams including the San Antonio Spurs, Cleveland Browns, and more. Brian also works closely with Dr. John Berardi as a nutrition educator at Precision Nutrition, writing articles, presenting at seminars, and educating other fitness professionals as part of PN’s Certification courses. He’s a regular contributor to the Precision Nutrition blog and has been featured in Men’s Health, Men’s Fitness, Q Magazine, STACK, Testosterone Magazine, and more.