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Can losing weight weaken your bones? new study investigates

NCT ID NCT00472745

Knowledge-focused Sponsor: Rutgers University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This pilot study looked at how weight loss affects bone density in overweight or obese men. 44 men either followed a reduced-calorie diet to lose weight or maintained their weight for 6 months. Researchers measured changes in bone density and quality to see if weight loss has any effect on bone health.

What this could mean

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

What this could lead to
If successful, this study could help doctors understand how to help people lose weight without harming their bones.
What could go wrong
This is a small pilot study, so results may not apply to everyone. It only looks at bone changes, not long-term health outcomes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

44 people

The number who actually took part.

Start date

Mar 2007

Finished

Apr 2012

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

50 to 72 years

Sex

Male participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Obese or overweight * Must live in the geographic vicinity of Rutgers University Exclusion Criteria: * Currently on any medication known to influence calcium or bone metabolism, including HRT, or with evidence of diseases known to influence calcium metabolism (i.e. metabolic bone disease, hyperparathyroidism, untreated thyroid disease, significant immune, hepatic, or renal disease, significant cardiac disease \[i.e., heart attack or stroke in the past 6 months., abnormal EKG\], active malignancy or cancer therapy within the past year) * History of kidney stones * Weight gain or weight loss (5% of body wt) within 3 months prior to recruitment * Participation in other investigational studies during the 12-month study period * Usually have a very high or low intake of calcium (more than 1500 or less than 500 mg per day)

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Conditions

The condition(s) this trial relates to.

arthritic joint disease osteoporosis vitelliform macular dystrophy 2 Weight Loss

As listed by the trial registrant

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

BMD Weight loss

Contacts and locations

Locations

  • Rutgers University

    New Brunswick, New Jersey, 08901, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.