What Vitamin Deficiency Causes Downward Curved Fingernails? Demystifying Nail Health and Nutrition
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3 min read
While it's a common misconception, a vitamin deficiency is not typically the cause of downward curved fingernails. This specific nail change is more commonly linked to serious systemic issues affecting oxygen levels, rather than a single nutrient deficit. Instead, an upward-curving nail, or koilonychia, is the key indicator of a nutritional problem, specifically iron deficiency.
