You are still worrying to much about details.
-tryptophan
-worrying about cortisol
-pre/post workout meals / nutrient timing
-testosterone spikes
-caffeine / stims
-sulbutiamine
-carb cycling
take all that stuff combined and multiply is by a thousand, and it still doesn't account for 1% of strength training. I may not be an olympic lifter, but I do know how some of them train (I have trained with some fairly high level competitors) and half of them wouldn't even know what this stuff even is.
Get the right about of food, train heavy with good form, and rest.
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