calculate_nutritional_needs(weight=75, height=180, age=25, gender='male', activity_level=3, goal='gain')
calculate_nutritional_needs(weight=65, height=165, age=30, gender='female', activity_level=2, goal='maintain')
calculate_nutritional_needs(weight=85, height=175, age=40, gender='male', activity_level=5, goal='lose')
calculate_nutritional_needs(weight=70, height=160, age=55, gender='female', activity_level=1, goal='lose')