Tag: Stages of nutrition

The human digestive system is a 30-foot-long, twisting tube through which food and nutrients travel. Before complex food can be broken down and absorbed, it must first be taken into the body, a process known as ingestion. This initial and critical stage of nutrition sets the entire digestive process in motion and involves a series of mechanical and chemical actions in the mouth.

An estimated 45% of deaths among children under 5 years of age are linked to undernutrition, highlighting the critical importance of a healthy nutritional process. At its core, the nutritional process is the comprehensive sequence by which an organism obtains, processes, and utilizes food for energy, growth, repair, and survival.

According to the National Institute of Environmental Health Sciences, nutrition is defined as the process of consuming, absorbing, and using nutrients from food necessary for life. This complex biological activity is not a single event but a continuous, multi-stage journey that powers every cell.

The human digestive system is a remarkably efficient process, with the journey from food intake to nutrient utilization typically taking 24 to 72 hours. For a nutrition diet to be effective, it's vital to understand **what are the three stages of nutrition**—ingestion, digestion, and absorption—that allow your body to convert food into fuel and building blocks.