Help support your immune system. 14 stick packs. Made with the highest quality of ingredients, Resistance C single serve packets with 1000 mg of Vitamin C, 25 mcg of Vitamin D and 30 mg of zinc may help support the immune system. This elite combination along with B Vitamins will help with your daily energy, build up your resistance and revitalize your body. Start feeling great every day, more energized and healthier by adding one convenient on-the-go nutritious stick pack to either hot or cold water and enjoy!