Do white spots on nails indicate calcium deficiency?
Small white spots often follow minor injury to the nail growth area, such as biting or harsh manicures. They do not automatically indicate calcium or zinc deficiency or justify supplements. Widespread whitening or changes in several nails need assessment of the pattern.
Details
Small injury-related spots may grow out
A limited painless spot after minor trauma may move toward the tip as the nail grows and gradually disappear. Reduce biting, pressure and damaging artificial-nail practices, and protect hands from irritants.
Whitening has different patterns
A crumbly white surface or nail separation may need assessment for fungal or skin disease. Broad bands or whitening of most of several nails warrants medication and health review rather than diagnosing mineral deficiency by appearance.
When to seek advice
Arrange examination if changes persist, spread, hurt or swell, or accompany general symptoms. A single spot does not justify extensive testing or high-dose supplements; examination determines what is needed.
Related reading: Do yellow nails mean a fungal infection, and how are they treated?.