1. Does drinking a lot of water mean you are well hydrated?

To assess whether you are maintaining a good level of hydration, the most useful approach is to observe several signals provided by your own body.

The colour of your urine

It is one of the simplest and most useful indicators.

• Pale yellow: this usually indicates a good level of hydration.
• Dark yellow or amber: this may suggest that you need to increase your fluid intake, especially if you also feel thirsty. Urine becomes darker when it is more concentrated and the kidneys retain water in response to a fluid deficit.
• Persistently very clear: this may indicate a high fluid intake. In healthy people, this is not usually a problem if it occurs occasionally, but there is no need to aim for completely colourless urine.

How often you urinate

Urinating several times a day is completely normal.

If, after drinking a large amount of water all at once, you immediately need to use the bathroom and pass a large volume of very diluted urine, some of that water may be eliminated quickly because it exceeds the body's capacity to retain it at that moment.

For this reason, it is usually more comfortable to spread fluid intake throughout the day rather than consuming a large amount in a very short period.

Do not always wait until you feel thirsty

Thirst is a highly effective mechanism that protects us from dehydration. However, by the time it appears, there may already be a slight loss of body water.

In older adults, the sensation of thirst may also be reduced. Therefore, maintaining a regular fluid intake adapted to physical activity, climate and individual needs can be helpful.

Listen to your body

Insufficient hydration may cause:

• fatigue;
• headaches;
• dry mouth;
• reduced physical or mental performance;
• dizziness, especially when standing up;
• constipation;
• a sensation of hunger.

These symptoms are not exclusive to dehydration, but they may indicate that it is worth reviewing your fluid intake.

In conclusion

Your hydration is probably adequate if:

• your urine is usually pale yellow;
• you urinate normally, without unusual changes;
• you do not regularly experience intense thirst;
• you maintain good physical and mental performance;
• your diet includes foods rich in water.

Good hydration is not about drinking as much water as possible, but about maintaining the balance your body needs.

2. How much water should you drink each day?

It is one of the most frequently repeated recommendations:

“Two litres a day.”

However, there is no universal amount that is suitable for everyone.

Water requirements depend on many factors:

• age;
• ambient temperature;
• physical activity;
• diet;
• pregnancy or breastfeeding;
• illness;
• medication.

Rather than trying to reach a specific number, the important thing is to maintain a good hydration status.

Conclusion: not everyone needs to drink the same amount of water. Even the same person may have different needs from one day to another.

Do you need the same amount of water on a day when you climb a mountain as on a day when you sit on the sofa with the air conditioning on? And what about a day when you eat fruit and vegetables at every meal compared with a day when you mainly eat bread and pasta?

3. Is it better to drink small sips throughout the day?

Not necessarily.

Our body regulates fluid balance through thirst, antidiuretic hormone — ADH — and the kidneys.

Spreading water intake throughout the day is often a comfortable strategy, especially for older adults or people who have a reduced sensation of thirst.

However, there is no evidence that constantly taking small sips is better for everyone.

The key is to avoid both dehydration and excessive water intake over a very short period.

Conclusion: you do not need to drink every few minutes. You need to maintain hydration that is appropriate for your circumstances.

4. When is the best time to drink water?

Our body follows circadian rhythms, and the kidneys are no exception.

During the day, they are better prepared to filter the blood, remove waste products and regulate the balance of water and minerals.

At night, antidiuretic hormone secretion increases, urine production decreases and the body tries to conserve water to support uninterrupted sleep.

For this reason, it may be useful to consume most of your fluids during the earlier hours of the day and avoid drinking large amounts immediately before going to bed.

This may help to:

• respect the kidneys' circadian rhythms;
• reduce the need to get up and urinate during the night, known as nocturia;
• support more continuous sleep in people who often wake up to use the bathroom.

This does not mean that you should stop drinking in the afternoon or evening if you are thirsty or have exercised. Hydration should always be adapted to the climate, physical activity and individual needs.

Practical tip: try to consume most of your fluids during the first 10–12 hours after waking and avoid drinking large volumes of water immediately before going to sleep.

5. Why is it not advisable to drink a lot of water all at once?

Many people believe that the more water they drink in one go, the better hydrated they become. However, the body works differently.

The kidneys continuously regulate the balance between water and minerals. When we drink a large amount of water in a very short period, the body reduces the secretion of antidiuretic hormone — ADH or vasopressin — and encourages the elimination of excess fluid through urine.

As a result, some of the water consumed may be eliminated quickly when it exceeds the body's immediate needs.

What can happen if you drink a lot of water all at once?

• urine production increases;
• you are more likely to need the bathroom soon afterwards;
• if you have lost a significant amount of sodium through exercise, heat or diarrhoea, drinking only water may contribute to an electrolyte imbalance.

What is usually the best strategy?

For most people, it is more comfortable and physiologically appropriate to spread hydration throughout the day rather than concentrate it into a few very large servings.

If you exercise intensely or sweat heavily, remember that you lose more than water: you also lose electrolytes, especially sodium.

6. Is low-mineral water healthier?

Not necessarily.

Water can provide minerals such as calcium, magnesium, bicarbonate and sodium. The amount varies considerably depending on the geological origin of the water.

Most of the minerals we need should come from a varied diet. However, water can also make a complementary contribution to daily intake.

If there is no specific medical recommendation, it may be useful to choose water with an appropriate mineral composition, including water that provides calcium and magnesium.

During intense exercise, heavy sweating or digestive losses caused by diarrhoea or vomiting, replacing only water without electrolytes may contribute to an imbalance between water and minerals.

One such condition is hyponatraemia, which occurs when the concentration of sodium in the blood falls excessively.

Conclusion: water does more than quench thirst. Its mineral composition may also be relevant.

7. Is it bad to drink water filtered by reverse osmosis?

No.

Reverse osmosis removes a significant proportion of the minerals present in water, together with other compounds.

If your diet is varied and rich in vegetables, fruit, pulses, nuts and seeds, this does not usually pose a problem.

However, some people may prefer to remineralise filtered water in order to restore some of these minerals and improve its taste.

8. How can water be remineralised?

There are several possible strategies:

• add mineral salts specifically formulated for water;
• use sugar-free electrolytes;
• add small amounts of seawater that is suitable for consumption and has full traceability;
• mix it with a small amount of coconut water;
• add a moderate amount of sea salt when appropriate.

Products available at Linverd

• Seawater.
• Raab Pure Electrolytes or Keto Drasanvi.
• Refix Organic Coconut-Apple, Pineapple, Lemon or Orange with seawater.
• Alkanatur water filter jug.

9. Do we hydrate only through the water we drink?

No.

Water reaches the body from three main sources.

Water from drinks

Water, coffee, tea and herbal infusions all contribute to daily fluid intake.

Water from food

Many fruits and vegetables contain between 80% and 95% water.

Foods that are particularly rich in water include cucumber, watermelon, strawberries, tomatoes and lettuce.

For this reason, a diet rich in fresh plant-based foods contributes significantly to daily hydration.

By contrast, a diet based mainly on industrially processed foods with a low water content may provide far less water through food.

Metabolic water

We also produce small amounts of water inside our cells.

During cellular energy production, the mitochondria generate water when metabolising fats, carbohydrates and proteins.

Fat oxidation generates more metabolic water per gram than carbohydrate or protein oxidation. This mechanism has played an important role in the survival of animals adapted to arid environments.

What happens on a ketogenic diet?

Although a high-fat diet may increase the production of metabolic water, it has not been shown to improve hydration status on its own.

In fact, during the first weeks of a ketogenic diet, water and sodium losses may increase because glycogen stores are reduced.

Some people therefore need to pay particular attention to replacing fluids and electrolytes.

Key idea: metabolic water is a fascinating adaptation, but it does not replace an adequate intake of water and electrolytes.

10. Is sparkling water less healthy?

No.

Sparkling water hydrates just as effectively as still water.

The main difference is the presence of dissolved carbon dioxide. In some people, it may increase the feeling of fullness or cause digestive discomfort, such as bloating or gas.

For most healthy people, it is a perfectly valid alternative. The key is to choose sparkling water without added sugars.

Practical tip: to reduce your intake of soft drinks, sugary drinks or alcohol, you can order sparkling water with ice and lemon.

At home, you can also combine sparkling water with lemon, slices of ginger and ice, or mix it with a small amount of beetroot and blueberry smoothie.

11. What is structured water?

This is one of the topics that has attracted the most interest in recent years.

Some hypotheses suggest that water near certain biological surfaces may adopt a different molecular organisation from conventional water.

This concept is sometimes associated with the exclusion zone or the idea of a supposed “fourth state of water”.

However, its relevance to human hydration and the commercial claims associated with it are not yet supported by sufficiently strong scientific evidence.

It has also not been consistently demonstrated that exposing water to sunlight produces clinically relevant benefits for hydration, energy or mood.

Key idea: it is an interesting area of research, but it should not be presented as a scientifically proven hydration strategy.

12. Which drink is best for hydration after exercise?

It depends on the duration and intensity of the activity.

• Light activity lasting less than 60 minutes: water is usually sufficient for most people.
• Intense or prolonged exercise, hot conditions or heavy sweating: replacing electrolytes may also be useful.

Products available at Linverd

• Cocomi or Dr. Goerg coconut water.
• Raab Pure Electrolytes or Keto Drasanvi.
• Refix Organic Coconut-Apple, Lemon, Orange or Pineapple.
• Seawater.

13. Is alkaline water better for your health?

The answer depends on why you choose it.

To date, there is no strong scientific evidence showing that drinking alkaline water improves the health of the general population or “alkalises” the body.

The body keeps blood pH within a very narrow range, approximately 7.35–7.45, mainly through the lungs and kidneys.

Therefore, alkaline water does not significantly change the blood pH of a healthy person.

Naturally alkaline water

Its alkalinity comes from naturally occurring minerals such as:

• calcium;
• magnesium;
• bicarbonate.

In this case, its main value may lie in its mineral composition rather than its pH.

Artificially alkalised water

This is produced through processes such as electrolysis or different ionisation systems.

At present, there is no consistent evidence showing that these waters offer greater benefits than conventional drinking water for the general population.

What does the evidence say?

Some small studies have observed possible effects in specific situations, such as recovery after intense exercise or certain hydration-related markers.

However:

• there are few available studies;
• sample sizes are often small;
• the results are inconsistent.

For this reason, alkaline water cannot be broadly recommended on the basis of these possible effects.

So, is it worth choosing?

It may be a good option if:

• its mineral composition suits your needs;
• you enjoy its taste;
• it helps you drink enough water.

But not because it will “alkalise” your body.

Scientific note: buffering capacity

Water rich in bicarbonate may partially neutralise the acidity of stomach contents and, in some people, influence symptoms of acidity or reflux.

Bicarbonate also plays a role in acid-base balance, although this balance is mainly regulated by the lungs and kidneys.

What about the Alkanatur jug?

The main purpose of a filter jug is not to “alkalise” the body, but to improve certain characteristics of the water and reduce some compounds, depending on the system used and its certification.

If the system also adds calcium or magnesium, remineralisation may be an additional benefit. A slightly more alkaline pH would be secondary to the overall quality and composition of the water.

14. Does coffee dehydrate you?

It is one of the most widespread hydration myths.

Caffeine may have a mild diuretic effect, especially in people who do not consume it regularly.

However, people who drink coffee frequently develop tolerance, and this effect decreases considerably.

Coffee is also made primarily of water and therefore contributes to daily fluid intake.

This does not mean that excessive consumption is advisable. High caffeine intake may disrupt sleep, increase anxiety in sensitive individuals or cause digestive discomfort.

Key idea: coffee does not dehydrate you when consumed in moderation and can contribute to your daily fluid intake.

15. Is it bad to drink water during meals?

No.

There is no scientific evidence showing that drinking water during meals harms digestion in healthy people.

Water helps form the food bolus and supports the movement of food through the digestive tract.

It also does not dilute gastric juices to the point of preventing digestion. The stomach continuously regulates the production of acid and digestive enzymes.

Drinking very large amounts of water quickly while eating may increase the sensation of fullness or feel uncomfortable for some people.

Key idea: drinking one or two glasses of water during meals is fully compatible with good digestion.

16. Can drinking too much water be dangerous?

Yes.

Although it is uncommon, drinking very large amounts of water in a short period can be dangerous.

When we consume much more water than the kidneys can eliminate, the sodium in the blood becomes diluted. This condition is known as hyponatraemia.

If sodium levels fall too far, water enters the cells through osmosis. In the brain, this can cause cerebral oedema, which requires urgent medical attention.

Hyponatraemia has been reported, for example, in:

• marathon runners who drink large amounts of water without replacing electrolytes;
• people who perform prolonged exercise with heavy sweating;
• viral challenges involving drinking very large amounts of water in a short period.

It is a rare condition and can usually be avoided by adapting hydration to exercise demands and replacing electrolytes when sweat losses are significant.

Key idea: avoiding excessive water intake is just as important as drinking enough. Hydration is about maintaining the balance between water and minerals, not drinking the greatest possible amount.