How much protein do I need?
The British Nutrition Foundation puts the UK reference intake for adults at 0.75g of protein per kilogram of body weight a day, which is about 56g for a 75kg man and 45g for a 60kg woman. That figure is set for the general population. For people training hard, the BNF notes that the American College of Sports Medicine recommends 1.2 to 2.0g per kilogram a day, spread across the day.
In practice, most people on a 12 week body transformation eat three or four meals, so lunch carries a quarter to a third of the day’s protein. Your coach sets the daily figure from your weight and your goal at the first session, and it is a floor rather than a ceiling. If you have kidney disease or another medical condition, check any change in protein with your GP first.