As a healthcare professional with a background in nutrition and physiology, I can provide you with an informed explanation of what causes dehydration in adults.

Dehydration occurs when the body loses more fluids than it takes in, upsetting the balance of water and electrolytes in the body. This can happen for several reasons:


1. Insufficient Water Intake: Not drinking enough water or other fluids is a common cause of dehydration.

2. Increased Fluid Losses: This can be due to sweating excessively, especially in hot weather or during intense physical activity, or from illnesses that cause fever.

3. Diuretics: Certain medications, such as diuretics, can increase urine output, leading to dehydration if fluid intake is not increased accordingly.

4. Illness: Gastrointestinal illnesses, such as vomiting or diarrhea, can lead to significant fluid loss.

5. Chronic Conditions: Conditions like diabetes can cause increased urination, which can lead to dehydration if not managed properly.

6. Aging: Older adults may not sense thirst as acutely, and their bodies may not conserve water as effectively, making them more susceptible to dehydration.
7.
High Altitude: At high elevations, the air is less humid, which can increase respiratory water loss and contribute to dehydration.
8.
Caffeine and Alcohol: These substances can have a diuretic effect, increasing urine output and potentially leading to dehydration.

It's important to note that dehydration can have serious consequences, especially in vulnerable populations such as the very young, the elderly, and those with chronic health conditions.

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Hot, humid weather increases the amount you sweat and the amount of fluid you lose. Increased urination. This may be due to undiagnosed or uncontrolled diabetes. Certain medications, such as diuretics and some blood pressure medications, also can lead to dehydration, generally because they cause you to urinate more.read more >>