Dr. Longo's research and books have been very informative on fasting. I have no ties to the for profit side of his research but I've tried a few rounds of ProLon, which is a fasting mimicking diet founded from his research. I've experienced great short and more sustained results from using it. I generally approach the work week at a split of 18/6 for IF and don't eat after 8:00P anymore. It will be great to see more research into IF for longer term studies.