The Complexities of Measuring Body Fat

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Posted: August 01, 2025

Watch Time: 10:41 minutes

Posted: August 02, 2025

Watch Time: 10:41 minutes

Hosted By:

By Dr. Barry Sears

Founder & President, Zone Labs

Mary Perry

Clinical Trials Director, Zone Labs

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Summary

Body fat—not BMI—is the true predictor of your risk for heart disease and early death. But most accurate methods like underwater weighing or DEXA scans aren’t exactly bathroom-friendly. In this video, Dr. Barry Sears explains why BMI often gets it wrong and introduces a better at-home solution: the Body Fat Calculator at ZoneLiving.com.

Learn how this tool, based on gold-standard research, can help you understand your true body fat percentage and how much protein you need to preserve lean muscle. The best part? Once you know your numbers, the Zone Diet and ZoneRx Foods can help you reduce excess fat, gain muscle, and activate AMPK—your body’s master switch for burning fat efficiently.

Topics We Discuss:

[00:01]- So when you look at basically percent body fat, which is the best predictor of inflammation, the American population is far more

[00:08]- obese than or led to believe. Hello and welcome to the Wellness owned podcast where we discuss the science of wellness metabolism

[00:21]- and the dietary pathways to maintain them. I’m Mary Perry and I’m here with Dr. Barry Sears. And today we’re talking about BMI versus body fat

[00:29]- as a marker of wellness. So Dr. Sears, let’s just kind of get back to basics here. But why is excess body fat associated with chronic disease

[00:36]- and so important to know your numbers? Well, surprisingly the answer is one word, inflammation. Basically what excess body fat is is a way

[00:46]- of generating excess inflammation that spreads throughout the body. And the more excess inflammation you have, the more basically disease you become

[00:54]- and the shorter your lifespan. So this is one of the reasons you don’t want to have excess body fat. Mm-hmm.