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HMB Plus Vitamin D to Preserve Muscle in Older Adults Starting Semaglutide

NCT07760948 · Status: NOT_YET_RECRUITING · Phase: PHASE2 · Type: INTERVENTIONAL · Enrollment: 90

Last updated 2026-08-12

No results posted yet for this study

Summary

This randomized, double-blind, placebo-controlled trial will evaluate whether daily calcium beta-hydroxy-beta-methylbutyrate (calcium-HMB) plus vitamin D3 preserves muscle mass, physical function, and resting metabolism in adults aged 65 to 85 years with type 2 diabetes who are newly starting semaglutide as part of usual clinical care. Participants will receive calcium-HMB plus vitamin D3 or matching placebo for approximately 6 months. The primary outcome is change in appendicular lean mass measured by dual-energy X-ray absorptiometry from baseline to month 6. Secondary assessments include body composition, muscle strength, physical performance, gait, physical activity, resting metabolic rate, metabolic measures, and whole-body quantitative computed tomography. An optional mechanistic substudy of up to 36 participants will include D3-creatine dilution, nonradioactive stable isotope infusions, repeated blood sampling, a standardized meal, breath sampling, and vastus lateralis muscle biopsies at baseline and month 6.

Conditions

Interventions

DIETARY_SUPPLEMENT

Calcium-HMB Plus Vitamin D3

Each active capsule contains 750 mg calcium-HMB and 200 IU vitamin D3. Participants take two capsules twice daily, providing 3 g calcium-HMB and 800 IU vitamin D3 per day, for approximately 6 months.

OTHER

Matching placebo

Participants take two matching placebo capsules twice daily for approximately 6 months. Placebo capsules are matched to active product in appearance, packaging, labeling, and dosing schedule. Insert the final placebo ingredients if the PRS administrator requests them.

Sponsors & Collaborators

Principal Investigators

  • Robb Flynn, PhD · Vanderbilt University Medical Center

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
QUADRUPLE
Model
PARALLEL

Eligibility

Min Age
65 Years
Max Age
85 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-12-01
Primary Completion
2029-11-30
Completion
2030-11-30

Countries

  • United States

Study Locations

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Entities

Diseases
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07760948 on ClinicalTrials.gov