A study from Liverpool John Moores University suggests morning urine color could predict stress responses. Researchers found adults with darker, more concentrated urine showed stronger cortisol reactions during stressful tasks than well-hydrated participants. Cortisol is the body’s main stress hormone. The study involved 32 healthy adults aged 18 to 35 who completed a simulated job interview with public speaking and math. While anxiety and heart rate rose equally for all, cortisol levels stayed elevated up to 30 minutes in those with darker urine. Participants with low daily fluid intake, about 1.3 liters, showed greater stress hormone activity than those drinking about 4.4 liters. (Story URL)
