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The belief that individuals should consume eight glasses of water per day has been ingrained in popular wisdom. However, it’s time to dispel the misconceptions surrounding water intake. In this article, we will address five common myths about drinking water and provide evidence-based insights to help you understand your hydration needs better.

 60% of the body is water—False:

Contrary to the popular notion that the human body is 60% water, scientific evidence suggests that the water content varies depending on factors such as age, sex, and body composition (Adolph, 1921). While water plays a crucial role in bodily functions, the specific percentage can differ among individuals.

The body doesn’t know when it’s thirsty—False:

The human body has a sophisticated thirst mechanism that signals when it requires fluid replenishment. This mechanism helps maintain the body’s water balance by triggering the sensation of thirst (Vivanti, 2012). Trusting your body’s thirst cues is generally a reliable indicator of when to drink water.

 Water flushes out fat—False:

The notion that drinking water alone can flush out fat from the body is misleading. While water is essential for various metabolic processes, it does not possess direct fat-burning properties. Sustainable weight loss requires a comprehensive approach involving a balanced diet, regular exercise, and overall healthy lifestyle habits.

 Water flushes out toxins—False:

Contrary to the belief that water has the ability to flush out toxins, the human body already has efficient mechanisms in place to eliminate waste and toxins through organs like the liver and kidneys. While staying adequately hydrated is important for optimal bodily functions, water alone cannot eliminate toxins.

 Water helps dry skin—False:

Although hydration is crucial for maintaining healthy skin, the belief that drinking more water directly resolves dry skin issues is not entirely accurate. Dry skin can be influenced by various factors, including environmental conditions, genetics, and skincare practices. Moisturizing the skin externally and ensuring overall hydration through balanced water intake are both important for skin health.


It is worth noting that excessive water intake without considering electrolyte balance can lead to a condition known as hyponatremia. Hyponatremia occurs when the body’s electrolyte levels become diluted due to excessive water consumption, potentially leading to serious health complications (Vivanti, 2012). Moderation and listening to your body’s signals are key.


In conclusion, the “8 glasses of water a day” myth is not supported by scientific evidence. Water requirements vary among individuals and depend on various factors. While water is essential for maintaining hydration and supporting bodily functions, it is important to drink when you are thirsty and maintain a balanced approach to fluid intake. Understanding your body’s needs and consulting with healthcare professionals can help you develop a personalized approach to hydration.


  • Adolph EF. (1921). The regulation of the water content of the human organism. J Physiol (London), 55(1-2), 114-132.
  • Vivanti AP. (2012). Origins for the estimations of water requirements in adults. Eur J Clin Nutr, 66(12), 1282-1289.