do brown fingernails indicate glutathione deficiency Total melanonychia of 20 nails as a rare manifestation of vitamin B12 Nail changes can reflect underlying
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 indicate systemic Hair, nail, and pigment changes in major systemic disease ScienceDirect Nail Changes and Nutrition: What Do We Know Now? Podiatry Today Vitamins and nail: In health and diseases ScienceDirect
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