Low-fat or lean meats provide many nutrients that are necessary for the maintenance and health of the human body, according to the United States Department of Agriculture. Meat, fish, poultry, nuts, eggs and seeds are good options for satisfying the body's need for protein, while meats that are high in cholesterol and saturated fat can have a negative impact on human health.
Meat contains not only protein, but also important nutrients, including Vitamin E, zinc, magnesium, iron and the B vitamins, including B6, riboflavin, thiamin and niacin. Proteins help form the building blocks needed for blood, skin, cartilage, muscles and bones. Proteins also serve as building blocks for vitamins, hormones and enzymes. Proteins, along with carbohydrates and fat, provide the calories the body needs for fuel.
The B vitamins found in meat provide a variety of different functions within the body, including playing a vital role in the body's nervous system and the release of energy. They also help to build tissues and form red blood cells.
The iron in meat is used to carry oxygen throughout the blood cells. Eating foods that are sources of heme iron, specifically meats, can help to replenish the iron lost during the childbearing years. Magnesium in meat helps to build strong bones and zinc builds the immune system.