I believe you are correct, the most recent study I am aware of is this which points to an upper limit of 1.6g per kg. So even with the upper limit as target, its less than 150g (~129g) for a person of 180lbs. Again, this is the upper limit. As far as I am aware the lower limit is close to 0.8g per kg. Anywhere between these limits seems to be okay for me (an athlete).

edit: “0.8g per kg, not 0.8g total”