Please answer that question, because if its the same net amount of l-dopa in in as before, I don't understand why the 90% vs 20% would make a difference. If before it was 2.5 grams of 20% for .5 gram net l-dopa, and now its .56g of 90% for .5g net l-dopa the effect would be the same, just a smaller scoop.
If its a higher dose of l-dopa then yeah, thats going to have effect, but in a powder product changing the % of extract alone doesn't make much difference if the net amount is the same. It matters in capsules, because it gives you more space to include other ingredients.
So is the net amount of l-dopa higher?