(FILES) Packages of ground beef are seen at a supermarket in Houston, Texas, on March 17, 2026. First it was protein, now it's fiber: the "maxxing" mindset has permeated social media, as wellness influencers insist that loading up on certain nutrients is the key to vitality and a life-changing gut glow-up. (Photo by RONALDO SCHEMIDT / AFP via Getty Images)