This is based around your lifestyle…
Recent research has been published whether it even matters (how many) vs meeting the daily nutritional need.
When you speak of building lean muscle, “naturally” that occurs with caloric manipulation and good conditioning.
Have a body composition assessment done, find out where you currently stand. This creates a baseline & you can create your timeline from here.
I live by “eat what I want & deny myself nothing” when I’m on my game & walk around @ about 12% BF w/around 175 lbs. of lean muscle almost all year without extra supplements or killing myself on this “new killer” workout everybody is talking about.
When curious I discipline self more test and play with self to offer/gain new insight.
If you combine your conditioning with valid nutritional info & discipline self…watch out world
b good, b healthy