Den här översättningen är inte klar ännu. Den här sidan är just nu på engelska.

Gå till den engelska sidan

Cure My Disease

Don't miss your cure!

 Log in / Sign up

Scientists test if fingernails reveal your true diet

NCT ID NCT04933656

Knowledge-focused Sponsor: University of California, San Diego 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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study aimed to see if measuring stable carbon and nitrogen isotopes in blood, hair, and fingernails could better track what people eat compared to standard diet surveys. Researchers planned to feed healthy adults controlled meals with different sugar levels and then test the samples. However, the study was withdrawn before enrolling anyone, so no results are available.

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.

Expected to start

Aug 2021

An estimate. Start dates often move.

Expected to finish

Feb 2022

An estimate. End dates often move.

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

21 to 74 years

Sex

Anyone

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: * men and women; * aged 21 and 74 years; * no history of chronic disease and in general good health; * able to provide primary study outcome; and * willing to tolerate study diets designed for controlled feeding. Exclusion Criteria: * recent dietary changes, restrictions, allergies or preferences; * health conditions that require management beyond the scope of the study (e.g. heart failure, kidney disease, liver disease, gastrointestinal disorder); * history of drug or alcohol abuse; * plans to leave the San Diego area before study completion; and * lack of suitability per investigators' discretion.

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for Healthy adults are added.

Vår säkerhetsrekommendation!

Genom att skicka in godkänner du våra Användarvillkor

As listed by the trial registrant

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

Healthy adults

Contacts and locations

Locations

  • University of California, San Diego

    San Diego, California, 92093, United States

More trials for these conditions

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