Deficiency signal finder
Seventeen vitamins and minerals, mapped both ways: pick a symptom to see which deficiencies are classically linked — or pick a nutrient to see its signs, who runs low, and the blood test that settles it.
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Educational — not a diagnosis. Deficiency symptoms overlap heavily with non-nutrient causes, and only a blood test (interpreted by your doctor) confirms one. Prefer the full read? See the deficiency symptoms guide.