What Should I Eat and Drink When Dehydrated?
Quick answer: Water is first, but eating high-water-content foods and electrolyte-rich foods accelerates recovery. Avoid caffeine and alcohol which worsen dehydration.
What to Eat
Water (with electrolytes if severe)
The most direct fix — add a pinch of salt and a squeeze of lemon to plain water for electrolyte replacement.
Cucumbers (96% water)
One of the highest water-content foods — great for snacking during mild dehydration.
Watermelon (92% water)
High water content plus electrolytes (potassium, magnesium) — naturally rehydrating.
Oranges and citrus fruits
High water content, natural electrolytes, and vitamin C — excellent rehydration snack.
Coconut water
Natural isotonic drink — contains potassium and sodium at near-ideal ratios for rehydration.
Strawberries, peaches, grapes
85–90% water content — easy to eat and help restore fluid.
Broth and soup
Provides fluids + sodium + potassium — particularly valuable when solid food is hard to manage.
Bananas
Replace potassium lost through sweat; provide energy without dehydrating further.
Yogurt
92% water content — easy to eat and provides electrolytes and protein.
Lettuce, tomatoes, courgette, celery
90–95% water content — raw salads are surprisingly effective hydration aids.
What to Avoid
Alcohol
A diuretic — causes the kidneys to excrete more water than was consumed, worsening dehydration.
Coffee and caffeinated drinks
Mild diuretic effect — fine in moderate amounts normally, but avoid when actively dehydrated.
Salty processed foods and snacks
Excess sodium draws water from cells if you're not adequately hydrated — worsen dehydration.
Sugary drinks and soda
High sugar content increases osmotic demand; not effective for rehydration.
High-protein meals while dehydrated
Protein metabolism requires extra water — not ideal as the main meal when dehydrated.
Hydration
Drink small, frequent sips rather than large volumes at once (large amounts can trigger nausea). For mild to moderate dehydration: 500ml water + pinch salt + squeeze lemon. For more significant dehydration, oral rehydration sachets (ORS) are more effective.
Tips
- •Pale yellow urine = well hydrated. Dark yellow = mildly dehydrated. Amber or less frequent = significantly dehydrated.
- •Thirst is a lagging indicator — you're already mildly dehydrated by the time you feel thirsty.
- •In hot weather or after exercise, add electrolytes to water — plain water alone can dilute sodium during heavy sweating.
- •Children and elderly people dehydrate faster — monitor more actively in these groups.
- •Certain medications (diuretics, antihistamines) increase dehydration risk.