The recommendation for .8 g/kg is for sedentary individuals and athletes require more protein
if you are eating adequate carbohydrates then you wont need as much protein as carbohydrates have a protein sparring affect by providing enough glucose and glycogen storage therby limiting proteins role in energy production which happens through glucogenesis when the body runs low on glycogen and glucose levels fall.
This topic is one that has been debated for ever, and will continue to be so. The .08 grams recommended are, in my experience simply too low. As I have been an athlete all of my life,and have been training people for over 16 years now, I feel that 1 gram per pound of body weight is a more realistic recommendation. Those that train heavy may actually need more, however I feel this is a good place to start.
I hope this helps.
I have been following the 1gram per body pound now for over six months and can say that I have seen great results. I consume 2-3 shakes per day that equal about 40-60 grams of my daily intake and the rest I receive from lean and high protein meats such as chicken breast and fish such as tilapia and tuna. Keep in mind that my goal was to build muscle so that’s why I didn’t use the .08. Good luck!
For the average person I think that figure is high. A simple figure I use, divide body weight in half to equal protein grams, then divide by 5 or 6 meals per day for a more active individual who exercises five days out of seven.
I consumed a 1/1 ratio while prepairing for BB Contests, which included a double split work out routine and cardio five to six days per week. Then returned to the formula above.