ULTIMATE C-FX-90 Capsules This is a pH-balanced formula that gives you 500 mg of vitamin C, more than 8 times the daily value set by the federal government. To supplement vitamin C, we added the herb echinacea in the form of a standardized extract. Ultimate C-fx™ is great to take during the fall and winter to help support a healthy immune system. One case contains four bottles. • Promotes optimal well-being • Promotes optimal health* One case contains four bottles. * These statements have not been evaluated by the FDA. This is not intended to diagnose, treat, cure or prevent any diseases.