Cutting calories could reshape muscle fat and boost insulin response

NCT ID NCT00993460

Ongoing Knowledge-focused Sponsor: Vanderbilt University Source: ClinicalTrials.gov ↗

First seen Jul 10, 2026 · Last updated Jul 10, 2026

Summary

This study investigates how severe calorie restriction—achieved through weight-loss surgery—changes the types of fat stored in muscle and how muscles respond to insulin. Researchers will compare normal-weight participants with those who are obese and scheduled for gastric bypass. The goal is to understand whether reducing calories lowers harmful saturated fats in muscle and improves the body's ability to manage blood sugar.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: caloric restriction (via Roux-en-Y gastric bypass)
What this could lead to: If successful, this could reveal how reducing calories changes muscle fat composition and improves insulin sensitivity, pointing toward better treatments for obesity-related insulin resistance.
What could go wrong: This is a small, early-stage observational study (24 participants) that measures biological changes, not a treatment trial. Results may not apply to everyone, and the findings are exploratory.

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Conditions

The condition(s) this trial relates to.

Inflammation Insulin Resistance Obesity obesity disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

OBESITY

Contacts and locations

Locations

Vanderbilt University Medical Center

Nashville, Tennessee, 37232, United States

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