Scientists test hair and nails to track your diet
NCT ID NCT04933656
First seen Jan 31, 2026 · Last updated Jun 17, 2026 · Updated 19 times
Summary
This study aimed to see if measuring stable carbon and nitrogen isotopes in blood, hair, and fingernails could more accurately track what people eat compared to standard diet surveys. Researchers planned to feed healthy adults controlled meals and then compare isotope levels in their samples with survey answers. The study was withdrawn before enrolling any participants, so no results are available.
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This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Locations
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University of California, San Diego
San Diego, California, 92093, United States
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.