[사실은] "하루 물 2리터 건강 나빠져"…사망자도 있다 해서 보니 / SBS 8뉴스

Overview of the Controversy

The video discusses a dispute surrounding the common health advice that drinking about 2 liters of water per day is beneficial. It claims that a retired university chemistry professor argued on television that drinking 2 liters daily could harm health, and that severe outcomes (including deaths) have occurred when people drink too much water.

Fact-Check: What Can Go Wrong with Too Much Water

The fact-check segment explains why the criticism exists:

• Excessive water intake can rapidly lower blood sodium levels, leading to hyponatremia.
• In extreme cases, severe hyponatremia can result in serious health outcomes, including cardiac arrest.
• The controversy references examples such as marathon runner deaths linked to excessive water intake, including a widely cited 2002 marathon case.

Expert Medical Assessment (Nephrology Specialists)

To determine whether the message that “2 liters a day is harmful” is medically supported, the news team contacted three nephrology (kidney specialist) professors. Their conclusions:

• For generally healthy people, drinking more than 2 liters per day is not inherently dangerous in everyday circumstances.
• Risk is mainly associated with exceptional situations, such as people with kidney impairment (e.g., those on dialysis).
• The claim that specifically 2 liters poses a health risk is described as an overstatement, lacking clinical evidence for the general population.

Perspective on “Water Obsession”

The video also frames part of the concern as stemming from excessive “obsession” with water intake. The report acknowledges that:

• There can be risk when people force large amounts beyond what they actually need.
• However, this risk is different from normal hydration habits.

WHO Guidance on Daily Water Intake

The report cites World Health Organization (WHO) guidance, which recommends that daily water intake:

• varies by sex and circumstances
• includes intake from beverages and food
• may increase in hot weather

Presenters / Contributors

• Reporter Park Se-yong (SBS)
• University nephrology professors (three; names not provided in subtitles)
• Professor Lee Gae (mentioned in discussion)
• WHO (World Health Organization) (referenced as a source)