Carbohydrates, proteins, and fats are the three macronutrients that provide the body with energy and building blocks for growth and repair. Vitamins are micronutrients that are essential for various bodily functions, but they do not provide energy.

According to the World Health Organization, adults should consume at least 400 grams (or 4 servings) of fruits and vegetables per day for optimal health.

Salmon is a rich source of omega-3 fatty acids, which are essential for heart and brain health. Chicken, beef, and pork contain lower amounts of omega-3s.

Carbohydrates are the body's primary source of energy. They are broken down into glucose, which is then used for fuel by cells throughout the body.

Vitamin K is essential for the production of prothrombin, a protein that is necessary for blood clotting. Without adequate vitamin K, blood clotting can be impaired.

According to the World Health Organization, adults should engage in at least 150 minutes of moderate-intensity aerobic activity or 75 minutes of vigorous-intensity aerobic activity per week for optimal health.

Regular exercise is a protective factor against heart disease. High blood pressure, high cholesterol, and smoking are all risk factors that can increase the likelihood of developing heart disease.

The liver is responsible for filtering toxins from the blood, producing bile for digestion, and storing energy in the form of glycogen.

Fatigue, pale skin, and brittle nails are all common symptoms of iron deficiency anemia, a condition that occurs when the body does not have enough iron to produce healthy red blood cells.

Adults should consume approximately 2 liters (or 8 cups) of water per day to maintain proper hydration. This amount may vary depending on factors such as activity level and climate.

Milk, yogurt, and cheese are all excellent sources of calcium, which is essential for strong bones and teeth.

The kidneys are responsible for filtering waste products from the blood, producing red blood cells, regulating blood pressure, and maintaining the body's electrolyte balance.

Carbohydrates, proteins, and fats are the three macronutrients that provide the body with energy and building blocks for growth and repair. Minerals are micronutrients that are essential for various bodily functions, but they do not provide energy.

Adults should consume approximately 0.8 grams of protein per kilogram of body weight per day to maintain muscle mass and support overall health.

Scurvy is a disease caused by vitamin C deficiency. Symptoms of scurvy include bleeding gums, impaired wound healing, and skin problems.