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.
The USDA reports that sedentary men burn â and therefore should consume -- 2,000 to 2,600 calories each day to maintain a healthy body weight. However, this general guideline varies slightly by age group: Men ages 19 to 30 burn 2,400 to 2,600 calories daily. Men between the ages of 31 and 50 burn 2,200 to 2,400 calories.