Fingernails may unlock long-term clues to mineral deficiencies in your body

A new study from Fulda University of Applied Sciences has found that fingernails can reveal long-term mineral imbalances in the body. Unlike blood or urine tests, nail analysis offers a non-invasive way to track nutritional deficiencies over time. Researchers used advanced technology to link specific nail abnormalities with deviations in mineral levels.

The team examined nail samples to measure concentrations of calcium, potassium, sodium, and chromium. Using inductively coupled plasma mass spectrometry (ICP-MS), they detected precise mineral levels in participants with varying diets and lifestyles. White spots or brittle nails, for example, were associated with certain deficiencies.

Participants with thyroid conditions showed unusually high selenium levels in their nails. The study also found that omnivores had higher selenium than vegetarians or vegans. Those taking selenium supplements had 21% more of the mineral in their nails compared to non-users. Researchers highlighted the method’s cost-effectiveness and simplicity. Future work will combine nail mineral analysis with AI-assisted image scanning to better predict micronutrient deficiency risks.

The findings suggest fingernail testing could become a useful tool in nutritional and preventive health research. By providing long-term insights into mineral status, it may help identify deficiencies before symptoms appear. Further studies will explore how AI can enhance early detection through nail analysis.