10 Micronutrient Deficiencies That Affect Most People — Symptoms and Solutions
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Open Nutrient Encyclopedia to research any nutrient and its deficiency symptoms in detail.
1. Vitamin D
Deficient in an estimated 40% of US adults. Symptoms: fatigue, bone pain, frequent illness, depression, muscle weakness. Primary cause: insufficient sun exposure. Solution: 1000–4000 IU vitamin D3 supplementation with vitamin K2 (to direct calcium properly).
2. Magnesium
Insufficient intake in 60%+ of Western populations. Symptoms: muscle cramps, poor sleep, anxiety, constipation, headaches. Cause: soil depletion, processed food diet. Solution: dark leafy greens, nuts, seeds; supplement with magnesium glycinate or malate if needed.
3. Iron
Most common nutritional deficiency globally, especially in menstruating women. Symptoms: fatigue, pallor, brittle nails, cold hands/feet, poor concentration. Solution: heme iron (meat, fish) absorbs more efficiently than non-heme (plant sources). Pair non-heme iron with vitamin C.
4–10: B12, Zinc, Iodine, Omega-3, Vitamin K2, Calcium, Potassium
B12 (vegans, elderly — neurological damage, fatigue, megaloblastic anemia). Zinc (immune function, wound healing, taste/smell). Iodine (thyroid health, cognitive function — common in iodized-salt-avoiding populations). Omega-3 (cardiovascular, brain, inflammation — most people eat far too little DHA/EPA). Vitamin K2 (arterial calcification risk, rarely tested). Calcium (bone health, especially post-menopause). Potassium (hypertension, muscle cramps — most people eat <50% of the 3500 mg/day recommendation).
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Open Nutrient Encyclopedia to research any nutrient and its deficiency symptoms in detail.