Dr. Darshan Shah, the CEO and founder of Nexthealth, says that now is the best time for Tua Tagovailoa to consider retiring from football. Shah tells NewsNation that concussions are cumulative, and the damage from the three concussions he’s already sustained in his pro career won’t present as symptoms for another three to five years. #nfl #concussions #tuatagovailoa "NewsNation Now" is a no fluff, no filler newscast featuring up-to-the-minute news drawing from a network of journalists across the U.S. hosted by Adrienne Bankert. Weekends starting at 4p/3C. NewsNation is your source for fact-based, unbiased news for all America. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming: trib.al/Vu0Ikij