How to identify a nutrient deficiency
Symptom: Poor immunity or muscle weakness.
Possible deficiency: Vitamin E.
Overt deficiency is uncommon, but more than 90 percent of Americans don't meet the dietary recommendations (RDA). Vitamin E intake above the RDA may improve immune function, especially in the elderly.
What to eat: Certain unroasted nuts and nut oils, including almonds, peanuts, hazelnuts, and sunflower seeds.
Supplement with: 200-800 mg mixed tocopherols daily to support immunity.