Brian St. Pierre is the director of nutrition at Precision Nutrition, the coauthor of Precision Nutrition’s Level 1 Certification textbook, The Essentials of Nutrition and Coaching, and the mastermind behind the Precision Nutrition Calculator. He holds a master’s degree in Food Science and Human Nutrition from the University of Maine.
St. Pierre is a Registered Dietitian (RD), Certified Strength and Conditioning Specialist (CSCS) through the National Strength & Conditioning Association (NSCA), and a Certified Sports Nutritionist (CISSN). He also serves on the Men's Health Network (MHN) Board of Advisors.
During his time at Precision Nutrition, St. Pierre has provided nutrition coaching and performance meal planning to US Open champion Sloane Stephens and a host of other professional and Olympic athletes. He’s also served as a nutrition consultant for the NBA’s San Antonio Spurs and Brooklyn Nets and the NFL’s Cleveland Browns.
Prior to joining Precision Nutrition in 2012, St. Pierre was the head sports nutritionist and a strength and conditioning coach for Cressey Sports Performance, a high-performance facility in Hudson, Massachusetts and Jupiter, Florida.
A leading expert in teaching nutrition coaching skills to fitness professionals, St. Pierre has presented hundreds of workshops and trainings in five countries and 17 U.S. states. He’s been featured in US News & World Report, Men’s Health, Men’s Fitness, ESPN the Magazine, Shape, Q Magazine, STACK, and Testosterone Magazine and his insights have been included in stories on ESPN.com, About.com, BuzzFeed, and more.
Articles by Brian St. Pierre, MS, RD
The Ultimate Sports Nutrition Guide for Athletes and Coaches
Get a free PDF nutrition guide for your sport.
The Deep Health Assessment: How’s your health… REALLY?
Physical health isn’t the only kind of health.
Body Fat Calculator & Body Fat Percentage Calculator
Find out your body percentage and how it affects your health.
The “Deep Health” coaching secret that transforms short-term fitness goals into life-changing results
Losing 10 pounds. Running a half marathon. Getting six-pack abs. How do you turn short-term client goals into something meaningful, sustainable, and inspiring? Enter: deep health coaching, the revolutionary method that gets your clients the results they want, plus the results they need.
The Ultimate Macro Calculator
Do you want to lose weight? Gain muscle? Improve health? Boost performance? This free calorie, portion, and macro calculator from Precision Nutrition can help you achieve the results you want.
Nutrition and mental health: What (and how) to eat
No one food or supplement is king.
The traffic light eating method: Diet goldmine—or landmine?
How to eat nutritiously, enjoy your meals, and feel in control around food.
How to eat junk food: A guide for conflicted humans
No foods are off limits!
“Diet harder” just doesn’t work: Here’s how to REALLY solve the toughest client problems.
How do you help people stop overeating, keep working out, and start getting results? You uncover what’s REALLY holding them back, that’s how.
How to count (and track) macros for fat loss, muscle gain, and better health
If you don’t like counting calories, this might be a shortcut.
‘How much water should I drink?’
The “8 cups of water a day” rule has a few exceptions.
Health and fitness trackers: Do they help… or hurt?
Worksheets are still around for a reason.
The carnivore diet: Can it really transform your health?
Will the carnivore diet work for you (or your clients)? We look at the evidence.
Every question about PN’s hand-portion method—answered.
How to handle alcohol, mixed foods, soups, and more.
‘What should I eat?!’ The keto diet edition. [Infographic]
Use this guide to build a balanced keto-friendly eating plan in minutes.
‘What should I eat?!’ The fully plant-based diet edition. [Infographic]
This article answers the question, “What can I eat on a fully plant-based diet?!”
“Should I take vitamin D?” Here’s what the science says.
Seems like everyone's taking vitamin D… but should they?
‘What should I eat?!’ The Paleo diet edition. [Infographic]
How to choose “Paleo foods” that are right for your body, goals, and taste buds.
‘What should I eat?!’ The Mediterranean diet edition. [Infographic]
Learn how to make Mediterranean diet choices that are “just a little bit better.”
Precision Nutrition’sWeight Loss Calculator
This weight loss calculator (based on the NIH Body Weight Planner and adapted from research collected at the National Institute of Diabetes and Digestive and Kidney Diseases), factors in how your metabolism really works to predict how long it’ll take to reach a particular weight loss goal.
‘What should I eat?!’ How to choose the best vegetarian and plant-based foods for your body. [Infographic]
Start making better choices, whether you’re browsing the grocery store aisles, cooking a homemade meal, or ordering from a menu.
The Paleo diet: Your complete how-to guide.
Find out if the Paleo Diet is right for you.
Plant-based nutrition: A complete guide for vegetarians, pescatarians, flexitarians, and more.
This article will clear up the confusion around plant-based diets.
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