What Your Nails Reveal About Your Health

2. Split or Cracked Nails

Exposure to chemicals and environmental factors can make nails brittle and prone to splitting. Fungal infections and hypothyroidism, which reduces hormone production, can also cause splitting. If accompanied by weight gain, depression, or fatigue, hypothyroidism may be the cause. Split nails may also indicate deficiencies in biotin, protein, or iron. Frequent hand washing, cleaning agents, and dry climates can weaken nails. Wearing gloves, moisturizing, and eating nutrient-rich foods can help prevent splitting. Nail strengtheners and keeping nails at a moderate length can also reduce the risk.