Several factors can influence the absorption of nutrients in the body, including individual variations in digestive health, the presence of specific enzymes, and overall metabolism. The form of nutrient (e.g., whole foods vs. supplements) also plays a role, as does the presence of other compounds in food, such as fiber or antioxidants. Additionally, certain medical conditions, medications, and age can affect nutrient absorption. For optimal nutrient uptake, it is essential to consider these factors while maintaining a balanced diet.