From the Manufacturer:
Researchers are beginning to understand how substances in fruits and vegetables are able to promote good health, support a healthy immune system and improve one's overall quality of life. They contain an array of special antioxidant phytonutrients that can protect the body from free radicals, compounds that harm the immune system and can damage DNA. Put simply, antioxidants help safeguard your immune system, retard the aging process, and protect your good health.
As important as it is to eat enough fruits and vegetables, it may be just as important to eat a wide variety of fruits and vegetables. Since different types of plants contain different phytonutrients - each of which has it's own special set of benefits.