The main source of energy for muscle activity and body functioning. Eating too many carbohydrates can cause weight gain, insulin resistance, and nutrient deficiencies. Carbohydrates should take up about 55-60% of a person's diet.
Carbohydrates contain healthy amounts of vitamins an minerals.
A second source of energy for when the energy from carbohydrates runs out. Too much fat can cause major weight gain. Fats should fill up about 30% of a person's diet.
Vitamins help turn carbohydrates and fats into energy. Overdoses on vitamin A can cause your skin to crack, peel and itch. It can also lead to bone pain, damaged liver and causes fluid to accumulate in your brain. A person's diet should consist of about 700 to 900 micrograms of vitamin A.
Fat-Soluble Vitamins (A, D, E, and K) can be stored in the body for up to years at a time.
Protein is the main building material for bone, muscles, cartilage, skin, and blood. Eating too much protein can damage your kidneys. 10-15% of a person's diet should be made up of this nutrient.
Proteins include Meat, Fish, Poultry, Dairy, Eggs, and Soy.
Calcium is obtainable in animal-based, plant-based, fortified, and soy foods.
Minerals help the body function. Too much iron can be bad for the body, causing things like fatigue, joint pain, and depression. Overdosing calcium have been can cause increased risk for heart disease. Minerals should only take up 700 to 900 micrograms of a person's diet.
Water helps regulate body temperature and maintains other body functions. Water doesn't hurt the body. People should drink 2 liters of water a day to stay hydrated.
Less then 1% of the water supply on earth can be used as drinking water.