The Upper Safe Limit for Protein Consumption (Excerpt)

This excerpt taken from Dr. Campbell’s The Future of Nutrition (2020) discusses the “upper safe limit” (UL) for dietary protein, set at 35% of total calorie intake by the macronutrients subcommittee of the Food and Nutrition Board (FNB) in 2002. Beyond this passage, Dr. Campbell discusses the industry connections of the FNB board members, including … Continued

Nutrition Science

New Dietary Guidelines Require Radical Change

In a recent article, we discussed some of the key features of the newest edition of the dietary guidelines (2025–2030), including its recommendations for protein, full-fat dairy, processed foods, and alcohol. If you haven’t had a chance to read that article yet, now would be a great time to check it out. As we wrote … Continued

Nutrition Science

The New Dietary Guidelines: More Triangle Than Pyramid?

Most people never read the Dietary Guidelines for Americans, much less closely enough to keep up with all of the minute changes between each edition, which are released jointly every five years by the US Departments of Health and Human Services (HHS) and Agriculture (USDA). I suspect very few people ever change their dietary choices … Continued

Nutrition Science

Tipping Points and Food

In recent years, the phrase environmental tipping points has moved from scientific journals into public conversation. It now appears in climate reports, headlines, and policy debates, most recently and comprehensively in The Global Tipping Points Report for 2025.[1] Yet tipping points are not abstract metaphors or tools of alarm. They describe real, measurable processes within … Continued

Food Sustainability

The Silent Collapse Beneath the Waves: What Coral Reefs Reveal About a Planet Under Pressure

Scientists are increasingly warning that the world’s warm-water coral reefs have now crossed a global tipping point. This conclusion was recently brought into public focus by the Global Tipping Points report released in October 2025.[1] This report represents the culmination of decades of monitoring, thermal-stress modelling, and ecological observation. It shows that the combined pressures … Continued

Food Sustainability

The Quiet Acceleration Toward a Plant-Powered Planet

Social change often feels glacial, incremental, fragile, and at risk of slipping backward. History shows that transformation rarely moves in a straight line. Instead, it unfolds in waves, from slow adoption to steady accumulation, and then, suddenly, acceleration. Small shifts compound until they push entire systems past a tipping point. Today, as we confront converging … Continued

Food Sustainability

Top 5 Recipes of 2025

Your Must-Try List for 2026! Discover the top recipes our community has been raving about and sharing—if you haven’t tried them yet, be sure to add them to your culinary adventures for the coming year!

In The Kitchen

How the Low-FODMAP Diet Saved My Colon

Having been an avid plant-based eater for over thirty years, I thought I knew it all. I was never ill, I was full of energy, and, to prove that vegans get enough protein, I even achieved a Guinness World Record in speed skiing with one leg at the age of forty-seven. I thought I knew … Continued

Success Stories

Plant-Based Diets Improve Athletic Performance

If you’ve been following our work at the T. Colin Campbell Center for Nutrition Studies for a while, you’ve probably already seen some resources we have dedicated to athletes, including dozens of articles featuring anecdotal success stories and practical guides for improving your fitness. These resources are inspirational and useful; if you’re curious to check … Continued

Fitness