Daijiworld Media Network – New Delhi

New Delhi, Sep 30: Hydration may do more than keep your skin glowing or kidneys healthy—it could help regulate your body’s stress response, according to new research. A 2025 study published in the Journal of Applied Physiology found that adults who habitually drink less water show significantly higher cortisol spikes during stress tests, increasing long-term health risks.

Researchers divided participants into LOW and HIGH fluid-intake groups and measured their stress responses using the Trier Social Stress Test (TSST). While both groups experienced similar increases in heart rate and anxiety, only the LOW intake group exhibited a marked rise in salivary cortisol, highlighting that suboptimal hydration can amplify stress hormone reactions.

Experts say this finding aligns with previous research showing even mild dehydration can impair attention, memory, mood, and fatigue levels. Beyond cognitive effects, optimal hydration may support kidney health, metabolic balance, and long-term disease prevention.

Tips for smart hydration:

• Set a baseline: Adults should aim for 2–2.5 litres/day from all sources; urine should be pale yellow.
• Spread intake: Sip water consistently throughout the day rather than consuming large amounts at once.
• Include hydrating foods: Water-rich fruits, vegetables, soups, and herbal teas help meet daily needs.
• Monitor signs: Dark urine, fatigue, headaches, and reduced alertness may indicate underhydration.
• Adapt to conditions: Increase intake during stress, hot weather, or exercise.
• Avoid overhydration: Excessive intake is rare but possible; balance is essential.

The study underscores that daily, consistent hydration is not just about quenching thirst—it may help your body handle stress more effectively, supporting mental, hormonal, and metabolic health.