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Nutritional deficiencies:
A lack of essential nutrients such as biotin, iron, zinc, or magnesium can make nails brittle and rough. Since metabolism and nutrient absorption slow down with age, nutritional deficiencies are more common after age 40.
In some cases, vertical wrinkles can be a sign of health problems, such as circulatory disorders, thyroid problems, or even arthritis. If you notice other symptoms, such as fatigue, brittle hair, or changes in skin texture, it is recommended that you consult a doctor.
When should you be concerned?
Although vertical lines are generally benign, those associated with:
