We all know that drinking water is good for us. If you are feeling tired, have some water. Have a dry skin? Have some water. Have a dry throat? Have some water. It is almost like water is the fix to all our issues. May be it is, but not always. So, are we sometimes drinking more water than necessary? What happens then?

Many say that there is an 8x8 rule one must follow when it comes to drinking water.

What is the 8x8 drinking water rule?

Many believe that in the 8x8 rule, eight 240ml glasses of water per day adds up to almost 2 liters. However, it is not in the guidelines in both the UK and the EU health advisory. None of them recommends this specific amount.

So, where did it origin from?

The origins of this rule seem to come from misinterpreted advice given decades ago. In 1945, a US advisory board suggested adults should consume one milliliter of fluid per calorie of food, totaling about two liters for women and 2.5 liters for men. Importantly, this included all drinks and even water-rich foods like fruits and vegetables.

A later book in 1974 recommended six to eight glasses of water daily but also noted that coffee, tea, and even beer could count towards hydration. Yet, the idea of drinking two liters of plain water daily took hold and has persisted ever since.

How Much Water Do We Really Need?

As per experts, drinking 8 glasses of water a day may be unnecessary and the research estimates that the actual requirement is around 1.5 to 1.8 liters per day. This not only includes water, but all kinds of fluids from all sources that we may consume in a day.

Also, studies show that instead of following a rigid routine, what is best is to focus on factors like temperature, physical activity and health conditions for your water intake. Those in hot and humid climate, high altitudes or pregnant or breastfeeding, and athletes may require more water. Whereas those in cooler areas, with a more sedentary lifestyle won't. However, for the average person, thirst is a more reliable guide than any fixed rule.

ALSO READ: What Happens When You Drink Too Much Water?

Science of Hydration and Dangers Of Over hydration:

Water is necessary to transport nutrients, control temperature, and keep organs functioning. We lose water through sweat, urine, and respiration, so staying hydrated is critical. However, dehydration develops only when the body loses 1-2% of its total water content.

A widespread myth is that feeling thirsty indicates that you are already severely dehydrated. Experts argue that thirst is an excellent evolutionary mechanism that ensures us drink when we need to. The body also produces hormones that aid in water conservation when necessary.

Drinking More Water Than Needed:

While drinking too much water is generally harmless, it can cause hyponatremia, a condition in which salt levels in the blood become dangerously low. This can result in brain enlargement, disorientation, convulsions, and, in extreme cases, death.

There have been reports of athletes overhydrating during endurance races, resulting in significant difficulties. Experts caution that simply following hydration myths might be dangerous, stating that thirst remains the greatest signal of when to drink.

Sorbitol is often seen as a healthier alternative to sugar. The sugar alcohol is widely used in sugar-free chewing gum, candies and other low-calorie foods, offering sweetness with fewer calories than regular sugar.

But new research suggests that sorbitol may not just pass through the digestive system as it was previously assumed.

Scientists have found that after reaching the liver, sorbitol may be converted into a compound related to fructose, where it could trigger metabolic changes associated with fatty liver disease.

How Sorbitol Interacts With The Body?

Researchers from Washington University in St. Louis used zebrafish models to analyse what happens to sorbitol after it enters the body.

They found that after eating a meal, sorbitol can be produced naturally in the intestine from the glucose. What happens next depends partly on the bacteria residing in the gut.

Certain bacteria, including Aeromonas strains that degrades sorbitol, can consume sorbitol and convert it into a harmless bacterial byproduct. This may act as a protective filter, preventing the compound from reaching the liver.

But when those bacteria are absent, more sorbitol may pass through to the liver. Researchers found sorbitol can be converted into a derivative of fructose.

The researchers describe sorbitol as being “one transformation away from fructose”, because of how closely the two compounds are connected through metabolism.

Also read: Should You Really Cut Out Rice And Roti To Lose Weight? Expert Explains The Truth About Carbs

Could Sorbitol Affect Liver Health?

The metabolism of fructose in the liver has been linked to steatotic liver disease, a condition in which excess fat accumulates in liver cells. The new findings suggest that sorbitol may have some of the same metabolic effects.

The researchers found that sorbitol could contribute to processes linked with liver fat accumulation when the gut's ability to break it down was impaired.

However, this does not mean that eating sugar-free gum or food containing sorbitol will automatically and mandatorily cause fatty liver disease.

The research was conducted in zebrafish, and the study is exploring a biological mechanism rather than demonstrating that ordinary dietary sorbitol causes liver disease in humans.

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Gut Bacteria May Make A Difference

One of the more unexpected findings was the potential role of the gut microbiome in preventing this scenario. At relatively low levels, including amounts naturally obtained from fruit, researchers found that bacteria appeared capable of breaking down sorbitol.

Problems may surface when the amount of sorbitol becomes too high for these microbes to process efficiently. That could happen through consuming large quantities of products that contain sorbitol. High glucose intake may also increase the amount of sorbitol produced inside the intestine.

The researchers therefore suggest that how much sorbitol is consumed and the composition of an individual's gut bacteria could influence what happens to the compound and thus shape the risk of liver disease.

The study does not establish that sorbitol is harmful for humans even when consumed in moderate amounts. In fact, sorbitol occurs naturally in fruits such as stone fruits, and the researchers noted that relatively low amounts are generally handled effectively by gut bacteria.

The findings challenge the assumption that sugar substitutes are automatically metabolically healthy simply because they contain less sugar or fewer calories.

Carbohydrates have unfortunately become one of the most misunderstood parts of the diet, particularly when it comes to weight loss.

Cutting out rice, roti or other carbohydrate-rich foods completely is not necessarily the answer. Carbohydrates are an important source of energy, and the issue is more about the quality, quantity and overall balance of the diet than the nutrient itself.

Why Cutting Carbs Completely May Not Be The Answer

For Indians, this becomes particularly relevant because staples such as rice, roti, poha, idli and other grain-based foods are an integral part of our traditional diets.

Removing them completely can sometimes make a diet unnecessarily restrictive and difficult to sustain. It may also mean missing out on foods that provide fibre, vitamins, minerals and other nutrients, particularly when whole grains and minimally processed sources are chosen.

Also read: The New Nutrition Gap: Why Knowing What To Eat Doesn't Mean We Actually Eat It

Not All Carbohydrates Are Created Equal

What matters is understanding the difference between refined and high-quality carbohydrate sources. A diet dominated by refined flour, sugary foods, sweetened beverages and highly processed snacks is very different from one that includes whole grains, millets, legumes, vegetables and appropriately portioned rice or roti.

The Bigger Picture Behind Weight Loss

Another common mistake is replacing carbohydrates with excessive amounts of protein or fat without considering the overall nutritional balance.

Weight loss ultimately depends on overall energy intake, dietary quality, physical activity, sleep and several other factors—not simply whether carbohydrates are present on the plate.

Also read: Protein Is In Everything, But Is Every Source Actually Healthy? Experts Explain

How To Build A More Balanced Indian Plate

A practical approach is to focus on portions and pair carbohydrates with protein, vegetables and healthy fats. For example, roti with dal and vegetables or rice with dal, vegetables and curd can form a balanced meal. Choosing less-refined carbohydrate sources and paying attention to portion sizes can make the diet both nutritious and sustainable.

Carbohydrates do not need to be feared or completely eliminated. The goal should be to eat the right kind, in appropriate portions, as part of a balanced diet rather than following the latest anti-carb trend.

Healthy eating is something every individual is aware of, not only because of various online conversations around it but also because it is one of the subjects that is being discussed widely amongst individuals today.

From taking up diet charts with the help of AI to taking details from social media reels shared by several wellness influencers – information about food and health is readily available for all age groups at any time and it is customised according to their preferences, thanks to our algorithms.

Most people are aware that a healthy diet includes vegetables, fruits, home cooked meals, adequate water intake, and most importantly, limited consumption of outside food like fried and processed foods.

Unhealthy Eating Habits Continue To Rise Despite Awareness

Also read: From Pickles to Papad: Which Everyday Indian Foods Could Be Worth Rethinking for Cancer Prevention?

Despite growing awareness amongst the population, unhealthy eating habits continue to rise, which is eventually contributing to various lifestyle diseases like obesity, diabetes, cardiovascular diseases, and other health issues.

For most people, lack of information and knowledge about nutrition is not a challenge anymore, but the inability to act on that knowledge and consistently following through the habits and incorporating them into day-to-day life is. This growing gap between knowing what to eat and not being able to follow through is called the new nutrition gap.

Many individuals understand what a healthy diet is? yet struggle due to busy schedules, long working hours, and stress. Also, the convenience of ordering food often leads to dietary choices, that do not support long-term health. It is common for individuals to skip meal preparation, rely heavily on packaged food and snacks or food from restaurants, and beverages during stressful times despite being aware of their harmful impact on health.

“Social settings” add another challenge to sticking to one’s diet as planned. Office celebrations, family gatherings, and social outings are often centred around calorie dense foods and sugary treats. In addition, many people follow an all or nothing approach to eating, believing that a single indulgence has undone all their progress. This mindset can also make healthy eating feel difficult and unsustainable in the long run.

Also read: Protein Is In Everything, But Is Every Source Actually Healthy? Experts Explain

Closing this gap does not require restrictive diets or unrealistic rules. It is about building small, practical and healthy habits that can follow consistently over time. To maintain the same, some of the following small habits can be helpful:

1. Make healthy the easy option

2. Stop punishing yourself

A healthy lifestyle is not determined by a single meal. Occasionally eating a vada pav or enjoying a dessert, festive treats are not going to harm long-term health when it is balanced with nutritious meals throughout the day. Instead of feeling guilty after eating an unhealthy food and worrying over its impact your progress, one should simply focus on continuing the prioritising balanced eating habits with their next meal.

3. Make it personal

Don't eat healthy because an influencer said so. Eat healthy because you want to feel lighter, sleep better, and not feel acidity every evening. It is important to take guidance from a professional like a Certified Registered Dietiian when you are not able to follow through with your diet or are facing any other challenge instead of depending solely on unreliable nutrition advice and social media trends.

Healthy eating becomes easier when one makes conscious choices of maintaining a balanced diet, regular meal planning, mindful eating, and realistic lifestyle changes.

By Vidisha Parekh, Chief Dietician at Lilavati Hospital and Research Centre, Mumbai