Optibac probiotcs for daily immunity for daily immunity is a combination of live cultures such as bifidobacterium longum polyphenols such as pine bark extract and vitamin c to help you support a healthy immune system helps to support your bodys resistance to infection and promotes a healthy immune system whos it for for those with regular coughs amp colds or those with active demanding lifestyles each capsule provides 25 billion live cultures guaranteed 235mg polyphenols