Nutrient absorption is the process by which the body takes in essential substances from food. This occurs mainly in the small intestine, where digested food is broken down into smaller components like vitamins, minerals, carbohydrates, proteins, and fats. These nutrients then pass through the intestinal walls into the bloodstream, where they are transported to cells for energy, growth, and repair. Several factors can influence nutrient absorption, including the type of food consumed, the presence of other nutrients, and individual health conditions. For example, fiber can affect the absorption of certain minerals, while probiotics may enhance the uptake of nutrients by promoting a healthy gut environment.