Daily contact with chemicals and harsh environments can render nails fragile and likely to split. Fungal infections and hypothyroidism, which slows hormone production, can also lead to cracking. If paired with symptoms like weight gain, low mood, or exhaustion, hypothyroidism might be at play. Split nails could also signal a lack of biotin, protein, or iron. Frequent hand washing, harsh cleaners, and cold, dry weather can further weaken nails. Shielding hands with gloves, moisturizing often, and maintaining a nutrient-packed diet can curb these problems. Using nail hardeners and keeping nails at a reasonable length can also lower the risk of splitting and breaking.
