For the long time I am trying to find out if the following is truth: They say that some beverages dehydrates. I heard that about tea (sometimes green, sometimes black, sometimes both), coffee, beer and more (for example coke).
How does hydration from these sorts of drinks compare to others (e.g. water)? Why do these drinks less efficiently hydrate?
Answer
These drinks contain minor diuretics. Caffeine is the diuretic found in tea and coffee. Alcohol is the diuretic in beer. Diuretic substances increase the amount of urine produced i.e causes dehydration. This is often offset by the water content of mild diuretics like tea, coffee, and alcoholic drinks.
Caffeine belongs to the xanthines, and inhibits re-absorption of Na+ by cells, and increases flow rate of filtered fluid through the kidneys. This reduces water content in your body. In other words diuretics do dehydrate you, specifically caffeine will. Coffee, coke, and tea (very low doses of caffeine) are mild diuretics.
On the other hand alcohol is an anti-diuretic hormone inhibitor that inhibits arginine vasopressin.
No comments:
Post a Comment