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.
1 All of those 1155 calories will come from carbs. 2  And, since 1 gram of carbs contains 4 calories, all our example person would need to do now is divide 1155 by 4 and get 288. 3  Which means, this example person would need to eat about 288 grams of carbs per day.igure out how many calories are still left over after protein and fat are factored in, and then just divide that left over amount by 4. The answer you get is how many grams of carbs you should eat per day.