While nail “quizzes” are just for fun, your nails can offer real, science-backed clues about your overall health, nutrition, and habits. Changes in color, texture, or shape often reflect what’s happening inside your body—sometimes long before other symptoms appear.
Here’s what to look for—and when it matters:
Common Nail Signs & What They May Mean
1. BRITTLE, PEELING, OR SPLITTING NAILS
Likely causes:
Frequent wet-dry cycles (washing dishes, sanitizing)
Aging (nails naturally thin after 60)
Nutrient gaps: Low iron, biotin (B7), or omega-3s
What to do:
Wear gloves for cleaning
Moisturize cuticles nightly with jojoba or almond oil
Eat more eggs, salmon, nuts, and leafy greens
2. VERTICAL RIDGES (RUNNING TOP TO BOTTOM)
Usually normal—especially after age 50. Like wrinkles, they’re often just a sign of aging.
Concern if: Ridges are sudden, deep, or paired with discoloration—could signal nutrient deficiency or thyroid issues.
3. WHITE SPOTS (LEUKONYCHIA)
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