2. Dehydration of the Nail
With age, nails—like skin—tend to become drier. A lack of moisture makes nails more brittle and accentuates ridges. Frequent exposure to water, soap, and cleaning chemicals can worsen dryness.
If You Have These Lines on Your Nails After 40, It’s a Clear Sign That…
3. Nutritional Deficiencies
Low levels of key nutrients such as biotin, iron, zinc, and magnesium can weaken nails and make ridges more pronounced. Because metabolism and nutrient absorption often decline with age, deficiencies are more common after 40.
4. Health Conditions
In some cases, vertical ridges may indicate underlying health issues, including poor circulation, thyroid imbalance, or rheumatoid arthritis. If you also notice fatigue, brittle hair, or skin changes, it’s worth speaking with a doctor.
When Should You Worry?
Vertical ridges are usually harmless, but you should seek medical attention if you notice:
