The nutrition of man

"The Nutrition of Man" by Russell H. Chittenden is a scientific publication written in the early 20th century. The book presents a comprehensive analysis of human nutrition, discussing vital processes such as digestion, absorption, and the metabolic functions of the body. Chittenden aims to clarify the needs for food and the essential components that contribute to maintaining health and vitality in daily living. The opening of "The Nutrition of Man" introduces the fundamental concepts of nutrition and its significance to life. Chittenden explains that nutrition encompasses three primary functions: growth, rehabilitation of cells, and energy provision to sustain bodily activities. He emphasizes the organic nature of human food, categorizing it into proteins, carbohydrates, and fats, detailing their composition, digestion, and role within the human body. The author begins to delve into how food is processed, starting from mastication and saliva secretion, to the subsequent chemical actions in the stomach and small intestine, thus laying the groundwork for the scientific exploration of dietary needs and the physiological effects of different nutrients.