No, there’s no need to eat complementary protein sources. Your body doesn’t process protein that way. And really, plant sources of protein aren’t incomplete. They’re just a little lower in one or two of the essential amino acids. Eat a balanced diet, and get enough overall protein, and you’ll be fine. There really is no need to overthink this.
All amino acids have a use in the body and all get absorbed.
“Incomplete protein” is typically used incorrectly with the only actual incomplete protein that is commonly consumed being gelatin.
When most people us it they are talking about protein sources low in certain amino acids but not devoid.
Talking about complete and incomplete protein really became prevalent in the bodybuilding scene due to some sources of protein being low in leucine which is the amino acid responsible for muscle protein synthesis.
So to answer your question just eat a varied diet and everything will be just fine.
P.s. eat the damn egg yolk. That’s where all the nutrients are.
Just focus on complete protein sources. Animal nutrients are key to the body.
Don’t worry about minimum or maximums, just eat real food and eat plenty of fish, meat, eggs, dairy, etc as well as potatoes, fruit you do well with, etc.
Also don’t do this whole “egg whites only” thing. Eat the yolk, no the cholesterol is not bad, it won’t harm you. And don’t do this whole “low fat” thing either.