Many social media influencers have been promoting hot lemon water as a morning ritual with numerous health benefits, from weight loss to improved digestion. However, nutrition experts caution that while this beverage has some benefits, many of the claims lack scientific backing.
According to Emily Ho, nutrition professor and director of the Linus Pauling Institute at Oregon State University, the primary benefit of hot lemon water is hydration. The body needs to be hydrated to maintain its temperature, lubricate and cushion the joints, and remove waste through processes like sweating and urination. Good hydration is also associated with healthier skin, better mood and sharper thinking.
However, Joan Salge Blake, a dietitian and clinical professor of nutrition at Boston University, notes that “Any fluid is going to hydrate you,” meaning regular water, herbal tea, or even coffee provide the same hydration benefits.
Regarding digestive health, fluids are essential for keeping the digestive system moving. A 2020 study involving more than 4,500 adults in Turkey found that those who drank over eight cups of water daily had a 29 percent lower risk of developing constipation compared to those consuming less than four cups per day.
There is limited evidence suggesting lemon juice might assist with digestion. A small 2022 study discovered that lemon juice increased the rate at which the stomach emptied, but Ho advises taking these results “with a grain of salt” due to the study’s limited size.
As for immune system benefits, lemons do contain vitamin C, an essential nutrient for immune function. Squeezing half a large lemon into water provides approximately a quarter of the recommended daily amount. However, research doesn’t support the idea that additional vitamin C intake boosts immunity in people who aren’t deficient. One review of more than 60 clinical trials found that high-dose vitamin C supplements didn’t reduce the frequency, duration, or severity of colds.
Regarding weight loss claims, Judy Simon, a clinical dietitian and instructor at the University of Washington Medical Center, explains that hot lemon water might help with weight management only if it replaces higher-calorie beverages. There’s no convincing evidence that lemon water directly affects weight or metabolism.
Some research suggests citrus fruits may help stabilize blood sugar, and long-term studies have found associations between citrus consumption and reduced risks for Type 2 diabetes, but this evidence remains weak, according to Ho.
“There’s nothing wrong with it,” Salge Blake said, “but there isn’t really anything miraculous about it either.”
While hot lemon water won’t provide the transformative health benefits that some social media influencers claim, nutrition experts agree it remains a healthy, hydrating beverage choice, especially as a replacement for sugary drinks.
