Drink to Think: Discover the Secret to Boosting Productivity

Originally Published on LinkedIn December 2025  

Do afternoon energy slumps hit you like a freight train? Do you rely on
sugar, energy drinks, or shots of espresso to fight sleepiness and
fatigue?

What if I told you there was a better way to deal with those afternoon blues? A better antidote? It’s WATER. It doesn’t just quench our thirst; it’s also one of the simplest
remedies to reduce fatigue, sharpen focus, improve memory, and boost
productivity.

Research shows that increasing your daily water intake can have a significant
effect on brain functioning and your ability to get things done. The
more intense the workload, whether mental or physical, the more water
you need.

Statistics vary, but roughly 75% of the brain's composition is water. So even mild dehydration (1-2% water loss) can cause negative impacts on cognition.

While caffeine and sugar might be your go-to energy boosters, they only
provide short-term bursts of energy, followed by “crashing.” Yet
research shows that consistently drinking water throughout the day can
fight fatigue during mid-to-late afternoon.

Consistent hydration can:
1. Boost mental focus and attention: If you have “foggy” thinking, try drinking a glass of water to help you refocus.

2. Improve memory and recall: Short-term memory, or what’s known as your
working memory, can improve when your hydration status remains constant.

3. Enhance multitasking capability: If your job requires frequent
multitasking, staying hydrated helps maintain your ability to switch
between tasks more efficiently.

4. Increase alertness and reaction time: Caffeine and sugar offer a
short-term pick-me-up. Caffeine is also a mild diuretic, and that equals
water loss. Remember, even mild dehydration impacts cognitive
functioning, brings on fatigue, and lowers reaction times. But adequate
hydration can be a simple remedy and performance booster.

5. Support critical thinking and problem-solving: Sufficient water intake
helps maintain blood flow to the brain, keeping neurons working right,
thus improving your ability to perform complex cognitive tasks like
reasoning, judgment, and decision-making.

6. Promote long-term brain health: Good hydration is just one of several
low-cost lifestyle behaviors alongside sleep, exercise, and a good diet
that support brain health throughout your life.

Reliance on energy drinks and coffee may seem like a perfect solution,
especially if it’s become a daily habit, but why not give water a try?

Why not give this a try? Ditch the sugary, caffeine-laden drinks this week and aim to drink the recommended 8 glasses of water each day. Water needs vary from person to person, so you may find you need to drink more or less water. Keep a refillable bottle nearby so you can sip water throughout the day. Consistency is key! I’d love to know how it worked out for you.

Here’s to all of us drinking more H₂O and feeling better, thinking better, and working better!