A plant-based diet with 1.6g of protein per kg of body weight per day yields similar muscle lean mass and fiber composition effects as a protein-matched omnivorous diet in young men.

“a study in 36 young men found that a plant-based diet with 1.6g of daily protein intake per each kg of body weight showed the same effects on muscle lean mass and muscle fiber composition as a similar protein-matched omnivorous-diet.”