I have one of the more severe cases of POTS to be diagnosed. In flare 24/7/365 for 5+ years now. Currently taking 1750 mg of sodium a day, per neurologist's orders. Recently had an order that the post office missed scanning, and delivery went awry. 9 calendar days after the order, I emailed support, and was shocked to get a response at 4:30 pm on a Sunday. Not only did they respond on a Sunday, but they got my sodium tablets delivered to me via Amazon by Tues noon. I know there are people who supplement their athletic performance, but for those of us who rely on sodium supplements just to maintain normal blood volume and blood pressure, this product is a complete life changer. I'm still homebound, but reliable and effective medication management allows me to get 4000 steps a day, 50+ mins of physical therapy a day, etc. It's the difference between surviving and living.