4Life’s best-selling immune system product! 4Life® Transfer Factor Plus® Tri-Factor® Formula combines the power of Tri-Factor® Formula with a proprietary super-mushroom blend (shiitake, maitake, agaricus, and cordyceps) and zinc to help your immune system more effectively recognize, respond to, and remember potential health threats.*Take four (4) capsules of...

This advanced formula helps your immune system recognize, respond to, and remember potential health threats, while offering more broad-based immune system support through a proprietary combination of 4Life Transfer Factor® (immune messenger molecules) from cow colostrum, OvoFactor® from chicken egg yolks, and NanoFactor® mini molecules.*4Life Transfer Factor...