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Brown nails as clues for shock diagnosis Inaba 2025 Journal of General and Family Medicine Wiley Online Library Our nails can reveal more than you might expect. Changes in color, texture, or thickness may signal diabetes, nutrient deficiencies, or other health concerns. These signs are easy to overlook, but Melanonychia: Etiology, Diagnosis, and Treatment PMC How Vitamin B12 Deficiency Affects Nails Core Med Science
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