This book serves as a comprehensive survey of the impact of vitamin K2 on cellular functions and organ systems, indicating that vitamin K2 plays an important role in the differentiation/preservation of various cell phenotypes and as a stimulator and/or mediator of interorgan cross talk. Vitamin K2 binds to the transcription factor SXR/PXR, thus acting like a hormone (very much in the same manner as vitamin A and vitamin D). Therefore, vitamin K2 affects a multitude of organ systems, and it is reckoned to be one positive factor in bringing about ""longevity"" to the human body, e.g., supporting the functions/health of different organ systems, as well as correcting the functioning or even ""curing"" ailments striking several organs in our body. <br /> <img style=""float: left;margin-right: 10px;margin-top: 20px;"" src=""https://cdn.intechopen.com/public/images/Kappa-Logo.png"" alt=""Kappa"" width=""250""> <br /> <span style=""font-style: italic; font-size: 85%;""> Vitamin K2 - Vital for Health and Wellbeing has been produced and distributed through the support from Kappa Bioscience, Norway. </span>