NUTRIENTS VS. CALORIES DIETARY GUIDELINES. Nutrients: Carbohydrates Fats Energy Proteins (calories) Vitamins Minerals Water.

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Presentation transcript:

NUTRIENTS VS. CALORIES DIETARY GUIDELINES

Nutrients: Carbohydrates Fats Energy Proteins (calories) Vitamins Minerals Water

Problem in U.S.: Imbalance Nutrients vs. Calories Too many calories Not enough nutrients

2d Follow Dietary Guidelines Recommendations

Functional Foods Supply basic nutrients and….. Have positive health effects Examples: 1) beta carotene (carrots)- antioxidant 2) Soy protein (Tofu)- decreases heart disease risk 3) Omega 3 fats (fish): ditto 4) Probiotics (yogurt)- intestinal health

Fruits and Veggies People who eat lots of fruits & veggies everyday: Risk cancers, cardiovascular disease, cataracts, macular degeneration

Important ingredients in fruits & veggies: “Phytochemicals” Found in fruits, veggies, whole grains, legumes (peas, beans, lentils), seeds, soy products, garlic, onion, green/black tea Natural, protective chemicals in plants (“phyto”)

1 serving veggies = 100 different phytochemicals

Good “Green” Foods Bok choy, broccoli, collard greens, dark green leafy lettuce, kale, Romaine lettuce, spinach, turnip greens, water cress, beet greens, chard, Dandelion greens Chlorophyll gives green color

Good Orange-Yellow Foods Carrots, sweet potatoes, acorn/butternut squash, apricots, mangoes, pumpkin Rich in carotenoids (> 600 types) Beta-carotene (carrots) Lycopene= red color tomatoes

Carotenoids also in green veggies: hidden by chlorophyll

Other plant pigments: purple, red, pale yellow called flavonoids Examples: Wine, grape juice, tea, blueberries, raspberries, red cabbage, potatoes, onions, dark chocolate

Phytochemicals: How they work Some- antioxidants: protect cells/DNA from oxidative damage (heart disease, cancer) Others stimulate enzymes: deactivate carcinogens In intestine: block nitrates carcinogens nitrites

Phytochemicals: How they work Phytosterols: compete with cholesterol absorption- intestine: Lower blood cholesterol Phytoestrogens (soy): Block estrogen’s effect cancer

Phytochemicals: How they work Accumulate in eyes: risk macular degeneration (blindness adults)

Phytochemicals: How they work Risk: Cataracts

Recommendation: National Cancer Institute Eat rainbow of colors: 5 differently colored fruit & veggies everyday: MIX and MATCH “5-a-day..... the color way”

Problem: most Americans eat just white potatoes not dark green/orange- yellow foods

Cook: minimum time/little liquid- vitamins/minerals destroyed by heat Steaming, stir-frying, sautéing, microwaving, poaching

Acid/Base Balance in Your Body Acidic Foods: meat, dairy products, processed foods, soft drinks, snacks Blood Acidity (lower pH) Body adjusts (homeostasis): pulls calcium from bones Balances pH Keeps blood more alkaline (basic) Problem: Robbing bones of calcium

Fruits and Veggies (green leafy) Alkaline conditions in body pH (normal blood pH: 7.36) Protect bones