From the Manufacturer:
Contains Ester-C®, an advanced form of vitamin C that's readily absorbed by the body and gentle on the stomach. How Does NSI® Ultimate Immunity Formula Work?
Ultimate Immunity Formula is ideal for everyday immune system support, providing a unique combination of vitamins and nutrients that protect and nourish immune health.
Ultimate Immunity Formula contains 1,000 mg each of vitamin C as pure ascorbic acid and Ester-C®, an advanced, non-acidic form of vitamin C featuring advanced absorption and less harshness on the stomach. Besides working to boost immune function, vitamin C provides antioxidant protection, neutralizing unstable free radical molecules and stopping the chain-reaction of damage they can cause.
This formula also contains AHCC®, a proprietary blend derived from several species of mushrooms used for thousands of years to promote immune health. Mushrooms are believed to stimulate white blood cells to produce interferon, a protein naturally produced by the body in response to challenges by foreign invaders such as viruses and infection.
Green tea is included at 250 mg per serving, providing polyphenols, including Epigallocatechin gallate (EGCG), for antioxidant protection. EGCG is recognized as a powerful catechin that actively protects the membranes and DNA of normally-functioning, healthy cells from becoming corrupted by unstable cells (free radicals) produced by toxins, pollution, smoke and other environmental factors encountered every day.
Quercetin supplies additional antioxidant protection and also works to inhibit the release of histamine, which contributes to allergy symptoms such as runny nose, itchy eyes, sneezing and difficulty breathing.
Finally, Ultimate Immunity Formula contains GliSODin®, a patented antioxidant catalyst that may help increase the body's own natural production of antioxidants such as SOD (Superoxide Dismutase antioxidant enzyme), glutathione and catalase.