When I go to a health store, one of the products I see the most – especially among the impulse items at the checkout counter – are those packets to make vitamin C drinks. They come in dozens of flavors and promise lots of benefits from health to energy. To be honest, I’ve tried pretty much every flavor of them from several different brands. I’d used them as an energy drink alternative for a few years. That said, according to researchers and nutrition experts, they’re a giant waste of money.