Not drinking enough water could make your body react more strongly to stress, according to new research.
A study by Liverpool John Moores University (LJMU) found that people who regularly drink less than the recommended amount of water release higher levels of cortisol, the body’s main stress hormone. Surprisingly, these people didn’t feel thirstier than those who drank enough—they just had a stronger biological stress response.
What the Study Found
The study followed 32 participants over a week. Half of them drank under 1.5 liters of water per day, while the other half met the European Food Safety Authority’s guidelines (2.5 liters daily for men and 2 liters for women).
Researchers tracked hydration levels through urine and blood samples. Then, participants faced a stress test that included:
- A fake job interview in front of a panel in white coats
- A surprise mental math challenge under pressure
The results showed that those who drank less water had significantly higher cortisol levels after the test.
Why This Matters
Cortisol, often called the “stress hormone,” is made by the adrenal glands. It helps regulate stress, metabolism, immune response, and even blood pressure. But consistently high cortisol can harm health, contributing to issues like anxiety, poor sleep, and weakened immunity.
Professor Neil Walsh, from LJMU’s School of Sport and Exercise Sciences, explained:
“We know that people who don’t meet daily fluid recommendations are often poorly hydrated. What this study shows is that, under stress, their bodies release even more cortisol than well-hydrated people.”
Takeaway
Drinking enough water isn’t just about avoiding thirst—it may also help your body handle stress better. Health experts recommend men drink about 2.5 liters daily and women around 2 liters.
So, the next time you’re feeling stressed, reaching for a glass of water might do more than you think.
#HealthTips #StressRelief #HydrationMatters #Wellness #MindBodyBalance