Our expert says:
According the US National Academy of Sciences females from the age of 11 to 50 require 2 200 kcal or 9 200 kJ to maintain their weight. To lose weight you would have to reduce your energy intake to 6 300 kJ per day.
Males between 25 and 50, should ingest 2 900 kcal or 12 200 kJ to maintain weight, and 8 200 kJ to reduce.
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