Manila, Aug. 23 -- A recent study has found that people who fail to drink enough water each day may experience a stronger biological reaction to stress, the Irish broadcaster RTE reported on Friday.

Researchers at Liverpool John Moores University discovered that individuals with low daily fluid intake released higher levels of cortisol, the body's main stress hormone, when subjected to stressful situations, even though they did not feel thirstier than those who consumed more.

The study, published in the Journal of Applied Physiology, compared two groups of 16 adults each.

One group habitually drank less than 1.5 liters (around 0.4 gallons) of water per day, while the other met European Food Safety Authority guidelines of around 2.5 lit...