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Your Mother Was Your Mother Was Right- Right-
you really you really shouldshould eat your brussel eat your brussel sprouts…sprouts…
How nutrition affects your Immune SystemHow nutrition affects your Immune System
Victoria Dimitriades, MD
Clinical Assistant Professor of Pediatrics
Divisions of Allergy/Immunology and Rheumatology
Louisiana State University Health Sciences Center
DisclosuresDisclosuresI have nothing to disclose, other
than my expertise in eating.
B cell Immunity
T cell Immunity
Complement System Phagocyte
s
Mucous Membrane
s
Immune Function
Nutrition-Immunity linkNutrition-Immunity link
Macronutrient deficiency◦ Protein, Calories ◦ Malnutrition is the most common cause of
immune deficiency world-wide
Micronutrient deficiency◦ Elements, Vitamins
Overnutrition◦ Excess of macronutrients
Protein-energy Protein-energy malnutritionmalnutrition
Causes Limited food access Chronic disease Chronic Pain Dental/Feeding issues Medications Severe dieting
HAS Clinical Guidelines 2007
Protein-energy Protein-energy malnutritionmalnutrition Innate Immunity
Impaired phagocyte function
Adaptive Immunity T cells
Decreased numbers and function Increased susceptibility to opportunistic
infections
IronZincCopperSeleniumVitamins
MicronutrientsMicronutrients
Aids in T cell developmentGenerates some “reactive
oxygen species” to kill pathogens
Micronutrients- IronMicronutrients- Iron
Deficiency associated with: Anemia, paleness, fatigue Infections
Immune issues Reduced phagocyte activity Impaired T cell response
Risk of parasite and Candida infections Reduced immunoglobulin levels
Micronutrients- IronMicronutrients- Iron
Supplementation Recommended: 7-18mg/day
Micronutrients- IronMicronutrients- Iron
Micronutrients- ZincMicronutrients- Zinc Stimulates T cell production and subtype switching Stimulates complement system Stimulates phagocytes
Reduction in risk of pneumonia Reduction in common cold symptoms Reduction in infectious diarrhea
(world-wide) Antioxidant/Inflammatory Control
Deficiency associated with: Skin lesions, hair loss Loss of taste and smell, diarrhea Infections, poor wound healing
Immune issues Increased susceptibility to infections
(skin and GI system) Impaired phagocytosis Impaired NK cell activity Low T and B cells
Micronutrients- ZincMicronutrients- Zinc
Supplementation Recommended daily
dose: 3-11 mg/day of elemental zinc
Micronutrients- ZincMicronutrients- Zinc
Promotes T and B cell responses◦IL-2 production
Promotes phagocyte function
Micronutrients- CopperMicronutrients- Copper
Deficiency associated with: Neutropenia, anemia Neurologic issues
Immune issues Low white blood cells Reduced T cell responses Reduced phagocyte responses
Neutropenia
Micronutrients- CopperMicronutrients- Copper
Supplementation Recommended: 350-900 mcg/day
Micronutrients- CopperMicronutrients- Copper
Antioxidant effectsPromotes production of limited
reactive oxygen species (ROS) to fight infections
Stimulates general immune responsivenessT and B cell activationCytokine release
Micronutrients- SeleniumMicronutrients- Selenium
Deficiency associated with: More severe effects of viral
infections Muscle aches
Immune issues Loss of antioxidant host defense Decreased white blood cell and NK
cell function
Micronutrients- SeleniumMicronutrients- Selenium
Supplementation Recommended daily: 20-55 g/day
Micronutrients- SeleniumMicronutrients- Selenium
Supports structure and function of mucosal cells of eyes, lungs, gastrointestinal tract
Promotes response to bacterial infections
Affects growth and function of B cells
Affects activation of T cells
Vitamin AVitamin A
Deficiency associated with: Dry eyes, night blindness Diarrhea Respiratory infections Fat malabsorption
Vitamin AVitamin A
Immune issues: Loss of structure/function of cells on
mucosal surfaces Impaired resistance to infections,
especially gastrointestinal Diminished function of innate
immunity Impaired B and T cell responses
Vitamin AVitamin A
Supplementation Recommended: 1000-3000 IU/day
Vitamin AVitamin A
Vitamin BVitamin BB1- thiaminB2- riboflavinB3- niacinB5- pantothenic acidB6- pyridoxineB7- biotinB9- folic acidB12- cyanocobalmin
Vitamin B- allVitamin B- all B1- thiamin
◦ Aid in antibody responses B2- riboflavin
◦ Aid in antibody responses B3- niacin B5- pantothenic acid
◦ Aid in production and release of antibodies B6- pyridoxine
◦ Aids in T and B cell production and maturation B7- biotin B9- folic acid
◦ Aids in T cell production and maturation B12- cyanocobalamin
◦ Promotes NK cell activity, aids in T and B cell production
Vitamin B- allVitamin B- allSupplement
◦Range dependant on each vitamin
Antioxidant effects Protects cells from reactive oxygen species
(ROS) made by the body to control infections May have anti-viral activity
May aid in symptoms of common cold because of ROS function on surface of airway and lung epithelium
Improvement in both innate and adaptive immunity function
Vitamin CVitamin C
Deficiency associated with: Purpura/petechiae Poor wound healing (scurvy)
Immune issues: Impaired collagen synthesis for
barriers Impaired antioxidant performance-
increased free radical production
Vitamin CVitamin C
Supplementation Recommended: 75-90 mg/day
Vitamin CVitamin C
Necessary for phagocytic activityLimits inflammatory response
promoted by specific T cell subtypes
Promotes wound healing
Vitamin DVitamin D
Deficiency associated with: Rickets Autoimmune diseases Diabetes, type I Atopic diseases
Vitamin DVitamin D
Immune issues: B cells
◦ Decreased proliferation◦ Decreased immune globulin production
T cells- Decrease in overall proliferation ◦ TH1 cytokines decreased
◦ TH2 cytokines and T regulatory cells increased
Vitamin DVitamin D
Supplementation Sunlight (5-30 min, 2x per week) Foods- Fish, liver, fortified foods (milk, cheese, OJ) Supplementation
Vitamins Ergocalciferol (D2) or
Cholecalciferol (D3) Recommended: 600-800 IU Replenishment: 1000-4000 IU
Vitamin DVitamin D
Antioxidant◦Protects against cell damage from
free radicals◦Affects innate and adaptive
immunity
Vitamin EVitamin E
Deficiency associated with: Neurologic symptoms Atopic disease
Immune issues: Loss of phagocyte responses T and B cell dysfunction Difficulty controlling viral infections
Vitamin EVitamin E
Supplementation Recommended: 15-30 IU/day
Vitamin EVitamin E
Polyunsaturated fats (PUFA)Eicosapentaenoic acid (EPA) Docosahexaenoic acid (DHA)
Decreased production of inflammatory cytokines
Increased response by white blood cells to control inflammation
Decrease in clotting problems, cholesterol, and triglycerides
Omega-3 Fatty AcidsOmega-3 Fatty Acids
Goal is to achieve a proper ratio of of 1:4
Supplementation Fish (natural ratio)
3.5 oz piece = 1 g of 3 FA Fish oil (contains both)
1-4 g/day
Omega-3/Omega-6 RatioOmega-3/Omega-6 Ratio
GarlicGarlic
Used for both food and medicine for thousands of years
Allicin- exact function unknown ◦Anti-bacterial◦Helps control viruses◦Anti-fungal
Human studies have shown short-term, laboratory effects
Commonly promoted Commonly promoted foodsfoodsGreen tea (Camellia sinensis)Ginger (Zingiber officinale)Purple coneflower (Echinacea) Black cumin (Nigella sativa)Licorice (Glycyrrhiza glabra)St. John's wort (Hypericum
perforatum)
*research sparse in this area*
ProbioticsProbioticsLactobacilli, Bifidobacteria
species Strengthen gut barrier Stimulate production of T cells Stimulate production of antibodies Must be ingested regularly for
effectsFoods with probiotics:
fermentation
Overnutrition and ObesityOvernutrition and ObesityPromotes inflammationPromotion of immune system
stimulation causing autoimmunity
Poor wound healingIncreased susceptibility to
respiratory, gastrointestinal, and liver infections
SummarySummaryThe best way to “boost” you
immune system is to include foods naturally rich in nutrients and vitamins◦“EAT YOUR COLORS”
Oversupplementation can be detrimental:◦Toxicity (Vitamin A)◦Inhibition of phagocytes (zinc, iron,
copper)◦Obesity in relation to food excess
The Brussel Sprout The Brussel Sprout powerhousepowerhouse
Vitamins A, C (more than an orange!), B6, folic acid, iron, selenium
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