A medically-reviewed article for Healthline states the dangers of fasting from water and prolonged dehydration include urinary and kidney problems, low blood pressure, electrolyte imbalances, fainting, fatigue, memory issues and poor concentration.
In an article on website Health.com, contributing nutrition editor Cynthia Sass, RD, explained that only “20 percent of our fluids typically come from food”, leaving “eight to 12 cups” based on the Institute of Medicine’s guidelines – not including additional consumption due to exercise.
Cary Kreutzer, an associate professor at the University of Southern California’s schools of gerontology and medicine, compared water-fasting your kidneys to letting your car’s engine run out of oil.
“You can basically burn out some parts of the car that you’re going to have to get replaced,” she told the LA Times. “You don’t want those replacement parts to include your vital organs.”
America’s National Kidney Foundation also says adequate hydration is essential for healthy kidneys – quite the opposite to Prana’s suggestion to “give your kidneys a break”.
Experts typically advise drinking 1ml of water per one calorie of food consumed, but as long as your urine is clear or pale yellow, you should be adequately hydrated.
In other words, foraying into the world of dry-fasting probably won’t give you the results you’re looking for. Let’s all learn from Josh Brolin’s botched butt-sunning attempt and leave the questionable wellness fads alone.