When swollen lymph nodes are caused by an infection, this is known as lymphadenitis (lim-fad-uh-NIE-tis). Rarely, swollen lymph nodes are caused by cancer. Your lymph nodes, also called lymph glands, play a vital role in your body's ability to fight off infections. They function as filters, trapping viruses, bacteria and other causes of illnesses before they can infect other parts of your body.
As a source of calories, proteins provide four Calories per gram. Proteins are made up of smaller building blocks called amino acids. Twenty amino acids make up all of the human proteins. Of these twenty amino acids, the body can produce only 12, but 8 must be incorporated into the diet.
Nutrients 101: Essential and Non-Essential Nutrients Explained. Every day you consume food to nourish and fuel your body, as eating many different nutrients that are essential to maintaining optimal health. These are called essential nutrients and include vitamins, minerals, proteins, fats and carbohydrates.However, some nutrients are made in the human body, and these are called non-essential nutrients. Although termed non-essential, they are still required by the body for supporting daily bodily processes.itamins. Found in a variety of foods, especially vegetables and fruits and are key in helping the body make energy from food. 1  Vitamin A (beta-carotene, retinol). 2  Vitamin B1 (thiamin). 3  Vitamin B2 (riboflavin). 4  Vitamin B3 (niacin). 5  Vitamin B5 (pantothenic acid). 6  Vitamin B6 (pyridoxine). 7  Vitamin B7 (biotin).