We always use Emergen-C in our house. It’s a great source of vitamin C and many other vitamins. We also use their Electrolyte product, Electro-Mix. Pfizer has recently acquired Alacer Corp. While this product is wonderful, be wary of ingredient changes in the future. http://ow.ly/iZuwh
I would hope that a large corporation wouldn’t change a successful product, but as Pfizer is the largest drug maker on the planet, you can be pretty sure they don’t have your health in mind, but their profits.