do brown fingernails indicate glutathione deficiency Nail changes can reflect underlying hormonal and metabolic disorders. Features like onycholysis suggest hyperthyroidism, while brittle or slow-growing nails point to hypothyroidism. Findings such as koilonychia and thickened nails may systemic Total melanonychia of 20 nails
Total melanonychia of 20 nails as a rare manifestation of vitamin B12 deficiency PMC The Art of Nail Findings in Patients with Skin of Color Next Steps in Dermatology Hair, Nails, and Skin: Differentiating Cutaneous Manifestations of Micronutrient Deficiency DiBaise 2019 Nutrition in Clinical Practice Wiley Online Library Part 3: Signs of Vitamin Deficiency! White Spots on Nails! Melanonychia: What It Is, Causes & Treatment
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