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Drinking plenty of water may actually be good for you

In the first systematic look, UC San Francisco researchers find it helps with a variety of conditions from obesity to migraine.  

2024-11-27
(Press-News.org) Public health recommendations generally suggest drinking eight cups of water a day. And many people just assume it’s healthy to drink plenty of water.  

Now researchers at UC San Francisco have taken a systematic look at the available evidence. They concluded that drinking enough water can help with weight loss and prevent kidney stones, as well as migraines, urinary tract infections and low blood pressure.  

“For such a ubiquitous and simple intervention, the evidence hasn’t been clear and the benefits were not well-established, so we wanted to take a closer look,” said senior and corresponding author Benjamin Breyer, MD, MAS, the Taube Family Distinguished Professor and chair of the UCSF Department of Urology.  

“The amount of rigorous research turned out to be limited, but in some specific areas, there was a statistically significant benefit,” Breyer said. “To our knowledge, this is the first study assessing the benefits of water consumption on clinical outcomes broadly.” 

The study, which analyzed 18 randomized controlled trials, appears Nov. 25 in JAMA Network Open.  

The researchers found the most evidence in favor of drinking water to prevent kidney stones and to help people lose weight. 

Drinking eight cups of water a day significantly decreased the likelihood of getting another kidney stone. 

Several studies found that drinking about six cups of water a day helped adults lose weight. But a study that included adolescents found that drinking a little more than eight cups of water a day had no effect. 

Still, the authors said that encouraging people to drink water before meals would be a simple and cheap intervention that could have huge benefits, given the increased prevalence of obesity. 

Other studies indicated that water can help prevent migraines, control diabetes and low blood pressure, and prevent urinary tract infections.

Adults with recurrent headaches felt better after three months of drinking more water. 

Drinking about four more cups of water a day helped diabetic patients whose blood glucose levels were elevated.  

Drinking an additional six cups a day of water also helped women with recurrent urinary tract infections. It reduced the number of infections and increased the amount of time between them. 

And drinking more water helped young adults with low blood pressure.

“We know that dehydration is detrimental, particularly in someone with a history of kidney stones or urinary infections,” said Breyer, who is a member of the UCSF Department of Epidemiology and Biostatistics. “On the other hand, someone who suffers from frequent urination at times may benefit from drinking less. There isn’t a one size fits all approach for water consumption.” 

Authors: From UCSF, co-authors are Nizar Hakam, MBBS; Jose Luis Guzman Fuentes; Architha Sudhakar; Kevin D. Li; Catherine Nicholas; Jason L. Lui, MD; Peggy Tahir, MLIS; Charles P. Jones, MD; and Stephen Bent, MD. From Weill Cornell Medicine, Behnam Nabavizadeh, MD. 

 

About UCSF Health: UCSF Health is recognized worldwide for its innovative patient care, reflecting the latest medical knowledge, advanced technologies and pioneering research. It includes the flagship UCSF Medical Center, which is a top-ranked hospital, as well as UCSF Benioff Children’s Hospitals, with campuses in San Francisco and Oakland; Langley Porter Psychiatric Hospital; UCSF Benioff Children’s Physicians; and the UCSF Faculty Practice. These hospitals serve as the academic medical center of the University of California, San Francisco, which is world-renowned for its graduate-level health sciences education and biomedical research. UCSF Health has affiliations with hospitals and health organizations throughout the Bay Area. Visit https://www.ucsfhealth.org/. Follow UCSF Health on Facebook or on Twitter

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[Press-News.org] Drinking plenty of water may actually be good for you
In the first systematic look, UC San Francisco researchers find it helps with a variety of conditions from obesity to migraine.