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It begins with a minor irritation, one nail cracks while washing the dishes, another splits while typing on a laptop. If this is happening more often than it used to, you are not alone. Surveys in dermatology clinics suggest that more than 20% of people experience brittle nails at some point in their lives, with women reportedly more affected than men. What this raises is a question that goes beyond cosmetic dissatisfaction, could your nails be offering a visible signal that something deeper is amiss in your body? Brittle nails, medically known as onychoschizia, are far more than a mere nuisance. They can result from everyday wear and tear, but they may also be the first cue of an underlying deficit in your diet, or a lifestyle habit going unnoticed. What this really means is that your nail health might be offering critical feedback on your internal health and ignoring these signs could be a missed opportunity.