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Hydration is a topic surrounded by plenty of misconceptions. Between strict recommendations and sometimes misguided advice, it's important to clarify what "staying properly hydrated" really means. Here are some of the most common myths and the facts that debunk them.
Myth 1: You need to drink 8 glasses of water a day
One of the most common recommendations is the "8 glasses of water a day" rule. While this guideline can serve as a reference, it is far from universal. In reality, hydration needs vary depending on many factors: age, weight, physical activity, and even the climate you live in.
According to the Institute of Medicine, men are advised to consume around 3.7 litres of fluid per day, and women around 2.7 litres. However, this includes not only water, but also other drinks and water-rich foods (https://www.icliniq.com/articles/gastro-health/impact-of-hydration-on-digestion)
(https://www.mdpi.com/2072-6643/11/1/70) Fruits and vegetables such as cucumbers, watermelons and oranges also contribute to hydration.
Myth 2: Only water hydrates
It's common to think that only pure water can hydrate you properly. In reality, many other drinks contribute to hydration. Herbal teas, juices, milk, and even coffee (in moderation) can count towards your daily fluid intake.
Studies show that even caffeinated drinks such as tea and coffee have a hydrating effect, as long as they are consumed in moderation(https://www.icliniq.com/articles/gastro-health/impact-of-hydration-on-digestion). In addition, soups and certain water-rich foods are also good sources of hydration.
Myth 3: If you're thirsty, it's already too late
Many people believe that when thirst kicks in, it means you're already seriously dehydrated. In reality, thirst is your body's natural signal that you need more fluid, but it's not an emergency sign. For most people, drinking in response to thirst is a good way to stay properly hydrated.
However, it's important to stay alert, as some people, such as the elderly, feel thirst less, and others may need to drink more due to intense physical activity or high temperatures(https://www.mdpi.com/2072-6643/11/1/70)
Myth 4: Urine should always be clear
The colour of your urine is often used as an indicator of your hydration status, but it's wrong to believe it should always be perfectly clear. Slightly yellow urine is a sign of good hydration. Very clear urine may indicate that you're drinking more than necessary, which isn't always helpful and can dilute essential electrolytes in your body(https://www.icliniq.com/articles/gastro-health/impact-of-hydration-on-digestion)
On the other hand, dark or amber-coloured urine can indeed indicate a lack of hydration, in which case it's recommended to drink more fluid.
Myth 5: Sugary drinks hydrate as well as water
Sugary drinks, such as sodas or certain energy drinks, may seem hydrating because they contain water. However, they can contain high amounts of sugar that do more harm than good. As well as causing blood sugar spikes, these drinks can lead to long-term dehydration by increasing fluid loss through the kidneys (https://newsinhealth.nih.gov/2023/05/hydrating-health )
Many misconceptions about hydration can lead to unsuitable habits. It's essential to understand that our water needs vary according to many factors, and that healthy hydration can come from a variety of sources. By listening to your body's natural signals, drinking regularly, and avoiding overly sugary drinks, you can maintain an optimal fluid balance to support your health and daily well-being.
