This story was original published in September 2019. Lisa Drayer is a nutritionist, an author and a CNN health and nutrition contributor. This is more likely to happen with someone who doesn’t typically consume caffeine, and it could be offset by adding a tablespoon or two of milk to your cup of joe. of Folgers’ house blend – would be pretty much as hydrating as water, according to Maughan’s research.Ĭonsuming more than 300mg of caffeine, or about 2-4 cups of coffee, could cause you to lose excess fluid as the caffeine causes a mild, short-term diuretic effect. A regular coffee with about 80 milligrams of caffeine - roughtly what you would find in 12 oz. When it comes to coffee, how well your java hydrates you will depend on the amount of caffeine you consume. AFP PHOTO / PHILIPPE HUGUEN (Photo credit should read PHILIPPE HUGUEN/AFP/Getty Images) PHILIPPE HUGUEN/AFP/AFP/Getty Images Milk is poured from a plastic bottle in a glass on Novemin Lille. And technically, anything inside the intestine is outside your body. This process in effect “pulls” water from the body into the small intestine to dilute the sugars these beverages contain.

They may spend a little more time in the stomach and empty more slowly compared to plain water, but once these beverages enter the small intestine their high concentration of sugars gets diluted during a physiological process called osmosis. “This study tells us much of what we already knew: Electrolytes - like sodium and potassium - contribute to better hydration, while calories in beverages result in slower gastric emptying and therefore slower release of urination,” said Melissa Majumdar, a registered dietitian, personal trainer and spokeswoman for the Academy of Nutrition and Dietetics who was not involved in the study.īut here’s where it gets tricky: Beverages with more concentrated sugars, such as fruit juices or colas, are not necessarily as hydrating as their lower-sugar cousins.

Source: The American Journal of Clinical Nutrition, Volume 103, Issue 3, March 2016, Pages 717–723.

Oral rehydration solutions (like Pedialyte or Liquid I.V.).

Here’s what they found, ranked from most hydrating over a four-hour period to least. Andrews University tested 13 common beverages to see how they impact hydration. Those contain small amounts of sugar, as well as sodium and potassium, which can also help promote water retention in the body. The same can be said for oral rehydration solutions that are used to treat diarrhea. Milk also has sodium, which acts like a sponge and holds onto water in the body and results in less urine produced. For example, milk was found to be even more hydrating than plain water because it contains the sugar lactose, some protein and some fat, all of which help to slow the emptying of fluid from the stomach and keep hydration happening over a longer period. The other factor affecting how well a beverage hydrates relates to a drink’s nutrient composition. One factor is the volume of a given drink: The more you drink, the faster the drink empties from your stomach and gets absorbed into the bloodstream, where it can dilute the body’s fluids and hydrate you. Andrews’ School of Medicine and the study’s author. The reason has to do with how our bodies respond to beverages, according to Ronald Maughan, a professor at St.

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