One Nutrition P4 Immune is a rich blend of Vitamin C and powerful antioxidants including Grape Seed Extract, Green Tea Extract, Pine Bark Extract and Pomegranate Seed Extract, known as NLT-400. NLT-400 has been specifically formulated to amplify the beneficial potential of each ingredient. Why we love it? These ingredients work together in positive synergy to create a strong antioxidant effect, 25% stronger than the sum of its ingredients. .....and why you will too a simple A great way to support your immune system. This unique blend is rich in vitamin C and high-quality polyphenol ingredients including grape seed extract, green tea, pine bark and pomegranate extract all in 1 capsule. Scientifically researched blend of polyphenol-rich nutrients, including Grape Seed Extract, Green Tea Extract, Pine Bark Extract and Pomegranate Seed Extract know as NLT-400. Vitamin C for immune support. These ingredients work together in positive synergy to create a strong antioxidant effect, 25% stronger than the sum of its ingredients.