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.
In order to get a general idea of how many calories you burn in a day, multiply your current weight by the daily amount of energy used: inactive persons should multiply weight times 14 to 16 calories; somewhat active 16 to 18 calories; and extremely active 18 to 20 calories.110 lbs. A pace for healthy weight loss is two pounds per week. 2  Second, should your calorie counter determine eating less than 1000-1200 calories per day for a woman and 1300-1500 for a man, forgo what the calorie counter says and consume the aforementioned minimums.