First, I’m probably not the ideal user for this product, due to both adhesive allergies AND an extremely high sodium intake requirement, so of course the patch shows I’m losing a lot of sodium during my workouts. With those factors aside, I think this is a decent product. It works well and watching the lines fill up acts as some motivation. The results are probably accurate for someone without my health conditions and needs, but I know from my own experience I need more hydration and sodium after exercise than what the patch showed. It’s worth trying, even if you’re just a casual exerciser!