Investigation

Caffeine can increase urine production slightly, which is why coffee is sometimes considered dehydrating.

What’s Misleading

The idea that coffee always leads to dehydration is exaggerated. Studies show that:

• Moderate coffee intake does not cause fluid imbalance
• The water content in coffee offsets mild diuretic effects

Reality

• Occasional or moderate coffee consumption is safe
• It contributes to daily fluid intake
• Only excessive consumption may have noticeable effects

Advice

People should avoid excessive caffeine intake, but there is no need to stop drinking coffee out of fear of dehydration.

Conclusion

The claim is half true — coffee has mild diuretic properties, but it does not cause dehydration when consumed in normal amounts.