Here are the most common reasons:

🧾 What brittle nails may be telling you

1. Nutrient deficiencies (very common)

Lack of key nutrients can weaken nail structure:

• Iron deficiency → thin, spoon-shaped, or breaking nails
• Biotin (Vitamin B7) → brittle, slow-growing nails
• Protein deficiency → weak keratin formation
• Zinc deficiency → white spots, slow healing
• Vitamin B12 deficiency → ridges, discoloration

👉 This is one of the most frequent causes worldwide.

2. Frequent water exposure

• Constant handwashing or dishwashing
• Wet → dry cycles weaken nail layers

👉 Nails swell in water, then shrink, causing cracking.

3. Chemical exposure

• Detergents, cleaning products
• Nail polish remover (acetone)
• Harsh soaps

👉 These strip natural oils from nails.

4. Aging

• Natural decrease in oil production
• Nails become drier and more brittle over time

5. Medical conditions (important to rule out if persistent)

Thyroid disorders

• Hypothyroidism can cause dry, brittle nails
• Often accompanied by fatigue, weight gain, cold intolerance

Anemia

• Low iron reduces oxygen delivery to nail bed

Skin conditions

• Psoriasis or eczema can affect nail strength

6. Dehydration and dry climate

• Not enough water intake
• Dry air (very common in hot climates)

7. Nail habits

• Excessive filing or buffing
• Biting nails
• Artificial nails or gels (long-term use weakens nail plate)

🚨 When to be concerned

See a doctor if brittle nails come with:

• Severe fatigue or dizziness
• Hair loss
• Pale skin
• Sudden nail shape changes
• Chronic splitting across all nails

🛠️ How to improve brittle nails

Nutrition

• Eat more eggs, fish, lentils, nuts
• Ensure enough iron-rich foods (spinach, meat, beans)
• Consider biotin-rich foods (almonds, oats)

Protection

• Wear gloves for cleaning
• Limit acetone nail polish remover

Care habits

• Moisturize nails and cuticles daily
• Keep nails slightly short
• Avoid over-polishing

Hydration

• Drink enough water daily
• Use hand creams, especially after washing