Final answer:
Age, gender, and genetics are all significant factors influencing a person's dietary intake requirements, affecting metabolic rate and nutrient utilization.
Step-by-step explanation:
Factors that influence a person's intake requirements include a variety of biological and lifestyle elements. Age, gender, and genetics are all major factors that play a role in determining nutritional needs, metabolic rate, and various other physiological processes. For example, as people age, their metabolism tends to slow down, and their caloric needs may decrease. Gender can influence hormonal balance, muscle mass, and fat distribution, all of which can affect caloric requirements and nutrition. Genetics can predispose individuals to certain metabolic rates and can affect the absorption and utilization of nutrients.
Overall, the final answer is that all of the mentioned factors – age, gender, and genetics – are major factors that influence a person's intake requirements. This is a two line explanation of the factors influencing intake requirements, compressing the complexity of human physiology and individual differences into a concise statement that acknowledges the multi-factorial nature of nutrition and metabolism.