Smart Carbohydrates Guided Notes
Nutrition Science 101 • Unit 4
Fiber, Whole Grains & Food Choices
Guided Notes: Making Smart Carbohydrate Choices
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1. What Is Dietary Fiber?
• Dietary fiber is a complex carbohydrate that the human body fully digest. Instead of being broken down into for immediate energy, it passes relatively through your stomach and intestines.
Fiber plays a crucial role in maintaining overall health by:
Bullet 1
Keeping bowel movements
Bullet 2
Nourishing beneficial gut
Bullet 3
Promoting a feeling of
Additionally: A high-fiber diet supports long-term regulation and health.
2. How Does Fiber Regulate Digestion?
Insoluble Fiber Does NOT dissolve
• Does not dissolve in water: Passes through GI tract largely .
• Adds bulk to stool: Helps waste move through digestion.
• Prevents constipation: Promotes regular bowel movements.
Examples:
Wheat bran, whole grains, nuts, seeds, & vegetables.
Soluble Fiber Forms gel-like substance
• Forms a gel-like substance: Absorbs water to stool.
• Slows digestion: Allows for steady nutrient absorption & control.
• Acts as a prebiotic: Nourishes beneficial gut bacteria.
Examples:
Oats, beans, apples, barley, & chia seeds.
3. Fiber's Impact on Blood Sugar and Heart Health
Blood Sugar Regulation
• Soluble fiber creates a viscous gel structure within digestive tract.
• Actively slows down digestion and glucose .
• Outcome: Blood glucose rises , providing steady energy rather than abrupt spikes.
Heart Health Benefits
• Soluble fiber binds to cholesterol-rich acids.
• Removes these bound acids from the body as waste.
• Outcome: Liver pulls circulating LDL ("") cholesterol from bloodstream to replace them.
Unit 4: Nutrition Science • Student Guided Notes Page 1 of 2
Part II
Whole Grains, Nutrition Labels & Food Choices
Class Guided Notes
4. What Makes a Grain Whole?
1. Bran (Outer Layer) Protector
• The fibrous outer layer.
• Contains vitamins and minerals.
2. Germ (Core) Nutrient Core
• The nutrient-packed core.
• Contains healthy , vitamins, and antioxidants.
3. Endosperm (Middle) Energy Reserve
• The largest middle layer.
• Consisting mostly of carbohydrates.
Whole Grains (Brown Rice, Oatmeal, Whole-Wheat Bread, Popcorn):
Retain all three original parts (bran, germ, and endosperm), naturally rich in dietary fiber, iron, and B vitamins.
Refined Grains (White Flour, White Bread, White Rice):
Milled to remove the and . Even when enriched with synthetic vitamins, fiber is NOT restored.
5. Become a Nutrition Label Detective
When evaluating carbohydrate-rich foods, the Nutrition Facts label is your most valuable tool.
• Serving Size
Always start by checking this to ensure comparisons.
• Total Carbohydrates
Look at total carbs, but .
• Dietary Fiber
Evaluate this content for crucial benefits.
• Sugars (Total vs. Added)
• Natural sugars: Occur intrinsically in foods like or plain milk.
• Added sugars: Incorporated during (cereals, drinks).
6. Build a Better Breakfast
Improve a breakfast that is low in fiber or high in added sugar with these swaps:
• Swap Refined Grains
Choose whole grains like or whole-wheat toast.
• Add Fresh Fruit
Incorporate or bananas to naturally sweeten & add fiber.
• Choose Less-Sweetened Options
Opt for yogurt or unsweetened cereals.
• Pair Carbs with Protein
Combine complex carbs with or nut butter to stay full.
Unit 4: Nutrition Science • Student Guided Notes Page 2 of 2
