As you may already know, food is fuel for the body. Men are already prone to carry more weight so it requires more energy and nutrients to fuel them.
A healthy diet is key to prevent diseases that are prone to men such as cardiovascular disease and diabetes.
Energy requirements are higher for males than females. Calories = Energy
Younger men need more calories.
Men over 50 need more nutrient rich foods instead of calories.
Men over 70 need more vitamins and minerals more than anything else.