The concept behind Stress Protect goes something along the lines of this; when you sweat due to heat or exercise, it's a very different form of stress than when you sweat due to stress and anxiety. Stress sweat smells much worse than stress from exercise and the onset of it happens a lot quicker too. To really put it to the test, that morning I put on black clothes. I have a massive gripe with deodorants that leave white marks all over your top, but this one didn't seem to at all and it's not like I used it sparingly either. The results at the end of the day were pretty much the same as the morning I woke up. Still smelling fresh as a daisy, and I personally felt as though it actually stopped me from sweating a little bit more too, but I can't be certain.