What those vertical lines on your nails really reveal | May 25, 2025

Have you noticed fine vertical lines on your nails? I wonder if this is normal or something we should be concerned about? This detail, often considered unimportant, could actually reveal a lot about what’s going on inside your body. What if these tiny lines were a discreet reflection of your overall balance?
When nails become messengers

Our nails, much more than just supports for nail polish, are linked to several essential functions: blood circulation, the nervous system, metabolism… Sometimes they can reflect imbalances that we don’t notice elsewhere . Dehydration, temporary fatigue , but also signs of deficiencies or prolonged stress : upon closer inspection, these famous vertical ridges deserve more attention.

Iron deficiency: when oxygen circulation is worse
Iron plays a key role in transporting oxygen through red blood cells. A deficiency can affect nail growth and cause ridges to appear. Fatigue, pale complexion, dizziness… there are many signs that can accompany this deficiency. It most commonly affects women with heavy periods or people who eat little meat.

A simple blood test can help you take stock before considering supplementation.

Vitamin B12 deficiency: a valuable ally
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