oPCXtra is a super antioxidant drink mix made from a combination of six major sources of bioflavonoids. Four of the sources - Grape Seed Extract, Red Wine Extract, Pine Bark Extract and Green Tea Extract - supply a group of powerful antioxidant bioflavonoids called Oligomeric Proanthocyanidins (OPC).Bioflavonoids are complex organic plant compounds found mostly in fruits and vegetables. They function as a cofactor or helper to the body's immune system to respond to inflammation, allergy and infection.it provides your body with an advanced, cost-effective and generous dose of needed calcium through an optimized blend of calcium, vitamin D3, magnesium and vitamin C. Calcium supplementation may assist in the prevention and/or treatment of osteoporosis. It also may assist in blood and peripheral circulation and can help strengthen both bones and tissues.oPCXtra is a super antioxidant drink mix made from a combination of six major sources of bioflavonoids. Four of the sources - Grape Seed Extract, Red Wine Extract, Pine Bark Extract and Green Tea Extract - supply a group of powerful antioxidant bioflavonoids called Oligomeric Proanthocyanidins (OPC).Bioflavonoids are complex organic plant compounds found mostly in fruits and vegetables. They function as a cofactor or helper to the body's immune system to respond to inflammation, allergy and infection.it provides your body with an advanced, cost-effective and generous dose of needed calcium through an optimized blend of calcium, vitamin D3, magnesium and vitamin C. Calcium supplementation may assist in the prevention and/or treatment of osteoporosis. It also may assist in blood and peripheral circulation and can help strengthen both bones and tissues.oPCXtra is a super antioxidant drink mix made from a combination of six major sources of bioflavonoids. Four of the sources - Grape Seed Extract, Red Wine Extract, Pine Bark Extract and Green Tea Extract - supply a group of powerful antioxidant bioflavonoids called Oligomeric Proanthocyanidins (OPC).Bioflavonoids are complex organic plant compounds found mostly in fruits and vegetables. They function as a cofactor or helper to the body's immune system to respond to inflammation, allergy and infection.