Emergen-C is packed with vitamins to help keep you healthy. With every box of Emergen-C sold, a portion of the proceeds go to charity. Vitamins, energy and charity? Sounds like a sweet deal. Vitamin C plays an important role in immune system support. Make sure not to over do it, too much Vitamin C actually has the reverse effect! That's right, over consumption leads to immune suppression. We know they're delicious but try not to have more than 2 packets of Emergen-C per day. Don't forget about zinc. This mineral is also a powerful immune system booster.