Nutrition Essentials
Understanding the seven major types of nutrients is key to maintaining good health. These are divided into macronutrients (needed in large amounts) and micronutrients (needed in smaller quantities).
The main macronutrients include carbohydrates, proteins, fats, fiber, and water. Carbohydrates provide 4 kcal per gram and are our body's major energy source. Proteins (4 kcal per gram) build, repair, and maintain healthy tissues. Fats (9 kcal per gram) support brain development (which is 60% fat), act as structural components of cells, and help absorb vitamins A, D, E, and K. Choose unsaturated "good fats" over saturated and trans "bad fats" for health benefits.
Fiber, the indigestible part found in plants, stabilizes blood sugar and promotes gastrointestinal health. Water, while not energy-providing, makes up 70% of the body's non-fat mass and requires 1-7 liters daily to prevent dehydration.
Micronutrients include vitamins and minerals. Vitamins maintain healthy skin and hair, build bones, and help release energy from foods. Minerals like calcium, magnesium, iron, and zinc perform critical functions from building strong bones to regulating muscle contractions and supporting immune function.
Each mineral serves a specific purpose—potassium maintains fluid balance, iodine produces thyroid hormones, and selenium acts as an antioxidant. Good sources include meat, dairy, nuts, fruits, and vegetables, varying by the specific mineral.
Nutrition fact: While fats provide more than twice the calories per gram (9 kcal) compared to proteins and carbohydrates (4 kcal each), certain fats are essential for brain health and hormone production. It's about choosing the right kinds rather than eliminating them completely!