Other seafood sources for high iron and B12 include oysters, trout, salmon and haddock. For people over 50 who must limit saturated fat and cholesterol, seafood sources make superior choices to meats for building up your blood.
More specifically, sedentary men ages 19 to 30 need 2,400 to 2,600 calories; 31- to 50-year-old men require 2,200 to 2,400 calories; and sedentary men over the age of 50 need 2,000 to 2,200 calories each day to maintain a healthy body weight.
Unfortunately, this does include food that is stolen or spoils and is thrown away either by the grocer or consumer. Measured this way, the average American eats about 3,600 calories per person per day and has not changed much from 1909 when it was 3,500 calories per person per day.