The interactions and chemical process between the biological and non-biological components of food is known as food chemistry. Some of the biological components include meat, poultry, beer and milk. It includes carbohydrates, lipids and proteins in biochemistry. A specialized phase of food technology concerned with an understanding of the fundamental changes of composition and the physical condition of foodstuffs which may occur during and subsequent to industrial processing. Food chemists play several roles in the understanding of nutrition and health. Food Science deals with the production, processing, distribution, preparation, evaluation, and utilization of food. Food chemists work with plants that have been harvested for food, and animals that have been slaughtered for food. Food chemists are concerned with how these food products are processed, prepared, and distributed. Carbohydrates make up a group of chemical compounds found in plant and animal cells. Lipids include fats, oils, waxes, and cholesterol. In the body, fat serves as a source of energy, a thermal insulator, and a cushion around organs; and it is an important component of the cell. Proteins are important components of food. Every cell requires protein for structure and function. Proteins are complex polymers composed of amino acids.