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Nutrition knowledge while you wait
Test yourself with evidence-based nutrition trivia.
These facts are provided for general education and are based on information from authoritative U.S. nutrition and health agencies.
Which macronutrient provides the most calories per gram?
Is it carbohydrate, protein, or fat?
Fat provides approximately 9 calories per gram. Carbohydrate and protein each provide approximately 4 calories per gram.
What nutrient can improve absorption of iron from plant-based foods?
Think citrus fruits, strawberries, tomatoes, or peppers.
Vitamin C improves absorption of nonheme iron, the form of iron found in plant foods such as beans, lentils, nuts, and fortified grains.
Which type of fiber can help reduce cholesterol absorption?
Is it soluble fiber or insoluble fiber?
Soluble fiber can help reduce cholesterol absorption. Sources include oats, barley, beans, lentils, peas, nuts, seeds, and several fruits and vegetables.
Which mineral helps support nerve signals and muscle contraction?
It is naturally present in fruits, vegetables, dairy, beans, and other foods.
Potassium is needed for normal cell function and contributes to nerve transmission, muscle contraction, kidney function, and fluid balance.