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# What the scale can't see
- URL: https://www.redeyebr.com/pennington-biomedical-fat-research-metabolic-lsu-baton-rouge/
- Published: 2026-11-06T03:03:56.000Z
- Updated: 2026-11-06T03:03:56.000Z
- Description: All fat matters, but Pennington researchers say where that fat resides matters more.
- Author: JR Ball

No one is arguing that body fat is a good thing, but Pennington Biomedical researchers say what matters is where your body stores that fat. And yes, muscle mass is important, but it’s complicated.

**Why it matters:** The number on the scale tells you your weight, but it reveals little about your body's health—and that goes for the slim as much as the heavy.

**Science stuff:** Muscle is far from the whole health story. Where your body stores fat is an important chapter.z

- Pennington researchers found this after studying scan and health data from 59,269 UK Biobank participants for [a paper](https://academic.oup.com/jcem/advance-article/doi/10.1210/clinem/dgag407/8876181?ref=redeyebr.com) in *The Journal of Clinical Endocrinology & Metabolism*.
- Higher total fat-free mass—a stand-in for muscle that also counts bone and organs—was linked to more cases of [metabolic syndrome](https://www.cdc.gov/pcd/issues/2017/16%5F0287.htm?ref=redeyebr.com), a cluster of risk factors tied to heart disease and other chronic illness, and to elevated blood sugar.
- Fat-free mass as a share of body weight pointed the other way.
- The researchers stress that doesn’t make muscle harmful.

**Plot twist:** Fat packed around internal organs and tucked inside muscle tells the rest of the story.

- X-ray and MRI scans let researchers measure both, and they conclude the muscle-and-health link can’t be understood without accounting for fat distribution.
- Of the factors they tested, fat around the organs had the strongest influence on that link.
- Doctors diagnose metabolic syndrome when someone has three of five markers: a large waist, high triglycerides, low HDL cholesterol, high blood pressure or high blood sugar.

**What she said:** “Where fat is stored in the body matters,” Dr. Candida Rebello, who directs Pennington’s Nutrition and Chronic Disease Laboratory, said, pointing to fat around organs and inside muscle.

**The big picture:** Metabolic syndrome isn’t just an obesity problem.

- [CDC survey data](https://www.cdc.gov/pcd/issues/2017/16%5F0287.htm?ref=redeyebr.com) show more than 1 in 3 U.S. adults had it from 2007 to 2012—and even among adults who weren’t obese, about 1 in 6 did.
- The research came from Pennington’s Baton Rouge campus, in a state where [adult obesity](https://www.tfah.org/state-details/louisiana/?ref=redeyebr.com) rates are higher than in most states.

**The catch:** The study shows links, not proof that one thing causes another, and its participants were British.

- Pennington says the findings could help guide future research on better ways to measure what’s going on inside the body.

**The bottom line:** When it comes to your health, fat is a lot like real estate—location, location, location.