Conduct an experiment to find out. Calculate the total calories and the overall percentage of each of the macronutrients. Proteins and carbohydrates have 4 Calories per gram and fats have 9 Calories per gram. Then divide by the Calories per serving to find the percentage of total calories represented by each of the macronutrients. You'll find a database containing nutritional information, recipes, meal plans and links to other sites about aging research and Biosphere 2.
Food diaries can be very revealing.
Just for fun, keep a careful record of what you eat and drink for a few days or a week. Record the total amount of calories and nutrients. Investigate the role of oxygen in the production of free radicals. To observe an example of the effects of oxidation, slice an apple in half and expose it to the air. Both Roy Walford and Richard Weindruch have been studying the biology of aging and, in particular, the effects of calorie-restricted diets on the aging process, for decades.