Test yourself under real exam conditions: 50 timed questions, 60 on the clock, pass mark 70%%. Instant score with a full review of everything you got wrong. Free — no account needed.
Exam details
Nutrition is the science that studies how food affects the body, including the processes of ingestion, digestion, absorption, and utilization of nutrients for growth, maintenance, and repair.
It involves macronutrients, micronutrients, and water to support health.
Macronutrients are nutrients required in large amounts, including carbohydrates, proteins, and fats, which provide energy and building blocks for the body.
They are measured in grams and supply calories: 4 kcal/g for carbs and proteins, 9 kcal/g for fats.
Carbohydrates are the body's main energy source, providing 4 kcal per gram, and are essential for brain function and physical activity.
They are broken down into glucose for immediate use or stored as glycogen in the liver and muscles.
Proteins are made of amino acids, of which there are 20 types, including 9 essential ones that must come from diet.
They build and repair tissues, produce enzymes and hormones, and provide 4 kcal per gram.
Dietary fats include saturated, unsaturated (monounsaturated and polyunsaturated), and trans fats.
Unsaturated fats, like those in olive oil and fish, support heart health, while saturated and trans fats should be limited.