I think 30g-60g per is good depending on your stats. Anyone claiming that anymore than x amount of protein is absorbed per sitting is BS'ing you. I don't know of a single study adressing the issue and this has been such a big area of contention among bodybuilding "experts" if such a study existed somebody would ahve found it. It also fails to account for bioindividuality and a host of other factors. There is no way a 90 year old woman, a sixteen year old boy and a 300lb pro bodybuilder have the same threshold assimilation for protein.