Health & energy boost. Immune support. Electrolytes. Ener-c naturally: so much more than vitamin c, ener-c is a delicious effervescent multivitamin drink mix flavoured with real fruit juice powders. Ener-c's 100% non-gmo formula provides immune and thyroid support, b vitamins, electrolytes and so much more! boost of energy. Maintain immunity. Boost your electrolytes. Daily multivitamin.