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.
How Many Calories Should I Be Eating To Maintain: Continue eating your BMR calorie intake. How Many Calories Should I Eat To Gain Weight: For weight gain, take your BMR number and add anywhere from 250 to 300 calories. How Many Calories Should I Eat In A Day? The Harris Benedict Equation. The calorie calculator above does all the math for you to figure out how many calories you should eat per day.