The question is simple in title
is it a myth The Myth of 1 g/lb: Optimal Protein Intake for Bodybuilders
THIS article which includes its sources & the researches in history that dispells the myth of 1g protein per lb

but none of the articles that says you should eat 1g/lb protein has a source

infact studies suggest 1 or 1.5g protein /kg
Can anybody bring out the truth or even this is a marketing gimmick by supp companies