200g a day? Are you a big guy? I did an experiment in my 20s on building muscle on a plant based diet, and managed to gain 10kg in one year (muscle mass, confirmed by a DEXA scan). Total weight gain was about 16kg. Most of the surplus was water.
I started at 70kg (181cm), so pretty skinny, and without prior resistance training. I ate between 120and 140g of protein per day, without any shakes.
I am aware that these gains would not have continued, but my body obviously had more than enough with 130g to build muscle. I did eat a calorie surplus, but
200g seems like A LOT.
The latest in body building science recommends 1g of protein per day per 1lb of body mass (or 2.2g per 1kg for metric folks).
How did you do that in a plant based diet? What were your largest sources of protein? (To be clear: I'm doubting that you did it. I am genuinely curious.)