An underactive thyroid (hypothyroidism) may cause nails to become thin, brittle, and slow-growing. Other common symptoms include fatigue, dry skin, weight gain, and increased sensitivity to cold.
If brittle nails are accompanied by several of these symptoms, it may be worth discussing them with a healthcare professional.
5. Aging Naturally Changes Nail Structure
As we age, nail growth slows and the nail plate may become thinner. This natural process makes nails more likely to split or peel, especially if combined with frequent water exposure or nutritional deficiencies.
Regular moisturizing and gentle nail care become even more important over time.
6. Everyday Nail Habits Matter
Simple habits can make a significant difference: