Examples of antioxidants include vitamins C and E, selenium, and carotenoids, such as beta-carotene, lycopene, lutein, and zeaxanthin. This fact sheet provides basic information about antioxidants, summarizes what the science says about antioxidants and health, and suggests sources for additional information. Key Points Vegetables and fruits are rich sources of antioxidants.
Proteins, among the most complex of all organic compounds, are composed of amino acids (see Figure 2-4), which contain carbon, hydrogen, oxygen, and nitrogen atoms. Certain amino acids also have sulfur atoms, phosphorus, or other trace elements such as iron or copper.
Proteins are composed of simple sugars, carbohydrates are composed of nucleotides, and nucleic acids are composed of amino acids. Proteins are composed of amino acids, carbohydrates are composed of nucleotides, and nucleic acids are composed of simple sugars.Proteins are composed of nucleotides, carbohydrates are composed of simple sugars, and nucleic acids are composed of simple amino acids.Proteins are composed of nucleotides, carbohydrates are composed of amino acids, and nucleic acids are composed of simple sugars.Proteins are composed of amino acids, carbohydrates are composed of simple sugars, and nucleic acids are composed of nucleotides.Proteins are composed of simple sugars, carbohydrates are composed of amino acids, and nucleic acids are composed of nucleotides.roteins are composed of nucleotides, carbohydrates are composed of simple sugars, and nucleic acids are composed of simple amino acids. Proteins are composed of nucleotides, carbohydrates are composed of amino acids, and nucleic acids are composed of simple sugars.