You've probably asked yourself too if that old bottle of water in your pantry is still good to drink? Water is life, yet there are remaining questions about the shelf life. Whether you are stockpiling for emergencies or wondering if that bottled water left in a heated car is safe to drink, understanding if and how water "expires" is essential. This article goes into the science behind water storage and its potential risks and practical tips to ensure your water will remain safe and consumable.

Water itself does not spoil or degrade. Chemically, pure water (H₂O) remains unchanged indefinitely. However, there are issues that arise due to the containers in which it is stored and the environmental conditions surrounding the storage.

In the United States, most bottled water has an expiration date. This labeling is often misunderstood as being an indication of the water's safety, but it mainly has to do with quality. The U.S. Food and Drug Administration (FDA) confirms that commercially sealed bottled water is safe to drink indefinitely if stored properly. Over time, though, the taste, smell, and even the appearance of water may change due to interactions with its packaging.

Role of Packaging in Water Safety

Plastic Bottles and Chemical Leaching

Bottled water is mostly packed in polyethylene terephthalate, PET plastic. Even though it is light in weight, resistant, and recyclable, this material is limited in other aspects. It leaches chemicals in trace amounts in the water if heated or placed under direct sunlight. For instance, do not leave your bottled water in the hot car for an extended period.

The next is bisphenol A or BPA. This chemical has been used to soften some plastics and is known for its hormone disruption. Many producers have shifted toward BPA-free materials, but older bottles and improper storage still pose risks. Bottles carrying recycling code #7 may be BPA-contaminated. There are also concerns over microplastics and long-term storage.

Microplastics and Long-Term Storage

Over time, the plastic in the bottle may leach into the water, causing some to question health risks. In 2019, one article published in the International Journal of Environmental Research and Public Health noted that these particles exist but are usually not at high enough concentrations to pose a problem if the water is properly stored.

Also Read: What Happens When You Drink Too Much Water?

How Long Can Water Be Stored Safely?

Bottled Water

Unopened bottled water, kept in a cool, dark place, remains safe to drink for years. But manufacturers often advise that it should be consumed within two years of its manufacture date for best quality. After this period, it may start showing off-flavors or odors due to contact with the plastic.

Tap Water

Tap water, under the Environmental Protection Agency (EPA), undergoes strict standards for safety. It can be kept in pure, BPA-free bottles up to six months. Afterward, it loses its fresh flavor or becomes dirty if not properly sealed.

Rainwater

Don't drink rainwater unless treated first. It usually contains contaminants that should not reach the human stomach. It should be used to water plants if not filtered and sterilized first.

Signs That Water Has Gone Bad

Water itself doesn't go bad, but extrinsic factors make it unsafe. Always discard water that has:

An off smell: An earthy, metallic smell indicates contamination.

Coloration: Greenish or bluish coloration signifies microbial growth or rust.

Unpleasant taste: A metallic or stale taste is a hallmark of degradation.

Froth or particles: Indicate dirt, germs, or other impurities.

How to Store Water Safely?

Avoid Heat and Sunlight

Store water in a cool, dark place and out of direct sunlight. Heat breaks down the plastic, allowing chemicals to leach out more easily.

Choose the Right Containers

For long-term storage, select BPA-free or food-grade plastic containers. The best alternatives are stainless steel and glass containers, which avoid all the risks that plastic poses.

Hygiene Maintained

Wash and sanitize the container before refilling. Always seal the lids so that no bacteria get inside.

Rotate Your Stock

Use a first-in, first-out rotation system with stockpiled water. This will mean that you will use the oldest water first to keep your water supply fresh.

Is It Safe to Drink Water Past Its Expiration Date?

The expiration date on bottled water is a mark of its quality, not safety. Although the water is safe to drink past this date, it is sensible to check it for any signs of spoilage as mentioned above. Tap water that has been stored for longer periods should be checked for clarity and odor before consumption.

Plastic bottles, although convenient, degrade the environment. Only a few percent of PET bottles are recycled, while the rest remain in landfills or oceans. Choose reusable containers and tap water whenever possible to minimize plastic waste and environmental damage.

Water is one of the most precious resources in this world, yet it can be safe only if it is kept appropriately. People may tell you that water does not expire, but the fact is that packaging materials, exposure to the environment, and storage conditions may affect the quality of the water. Proper storage techniques, opting for BPA-free containers, ensure that water remains fresh, safe, and ready for consumption at any time.

Do you ever feel energetic in the morning only to feel sluggish in the afternoon? Unable to stifle the yawn at meetings or fighting to keep your eyes open in classrooms? And you find yourself inevitably reaching for that cup of coffee? You are not alone! This is called ‘post-prandial somnolence’. Medical jargon aside, let’s decode why it happens and how to beat it.

What Drives the Post-meal Drowsiness?

The body has a natural clock, called the Circadian rhythm, which drives sleep – wake cycles. This clock brings about a slight dip in alertness in the early afternoon, between 1PM to 4PM and hence the afternoon sleepiness.

But circadian rhythm isn’t the only one driving this slump. The status of digestive power and food plays an important role.

A weak digestive capacity or a weak Agni, as Ayurveda puts it, makes one sluggish after a meal. Also, the quantity and quality of the meal, that is, Matra and Guna of food, help make the distinction between being active or feeling sluggish in the afternoons. A diet rich in refined carbohydrates and fats like maida parotta, Poori, curd, buns/ breads, desserts, etc in large quantities drives this slump. These foods increase Kapha in the body, which makes a person sleepy.

Hydration plays an equally important role. Poor hydration, poor nighttime sleep, and a sedentary lifestyle can worsen the phenomenon.

How Do We Overcome It?

The trick to overcome this slump is to combine food wisely, rather than skipping food. Instead of a large bowl of polished rice with rasam and papad, one can go with a moderate amount of brown rice, a bowl of sambar, vegetable fry, sprouts, or nuts. Maida-based rotis can be replaced with barley-based chapathis with a bowl of moong dal, chana, green leafy vegetables, etc. One can also opt for millet-based khichdi, millet rotis for the same. Foods that are not heavy for digestion and in the right quantity help avoid mid- day sleepiness.

Maintaining hydration by adequate water intake is recommended. One can also opt for fresh fruit juices, water-rich fruits like melons, or water-rich vegetables. Buttermilk is another healthy option for the same.

Physical activity, or Vyayama as Ayurveda describes, is another important aspect to keep in mind. Prolonged sitting often leads to an increase in Kapha in the body, which results in sluggishness. It is especially true after meals. A short walk of 100 steps after lunch helps beat the sluggishness. Light shoulder and neck stretches in between work too shall keep one active.

However, persistent or excessive daytime sleepiness could be because of underlying medical conditions like thyroid disorders, diabetes mellitus, etc. Hence, it is important to consult the physician if one feels excessive sleepiness or an energy slump during the day.

One need not let the post–meal drowsiness define the rest of the day. A combination of the right food, hydration, and exercise can go a long way in restoring energy without the caffeine!

(By Dr Meghana K A, Assistant Professor, SDM College of Ayurveda, Hospital & Research Center, Udupi)

In today’s times, the consumers are becoming more health conscious and whenever they buy a new product, they tend to check the nutrition labels that helps them in making a better choice between multiple brands. However, making that choice can be a huge task since there is a surge in nutrition and health claims such as high protein, no added sugar, low fat, multigrain, etc., which usually confuse and often mislead them.

So now the question is: how do they make the right choice? The answer is by understanding how to read food labels. This understanding will help them in making informed decisions and choosing what is better suited for their health and needs. All packaged foods have a nutrition information label either at the back of the package or on the side.

Now let us look at a sample label and understand how to read it effectively.

1. Start with the serving size information:

While looking at the nutrition label, the first thing to notice should be the total number of servings in the package and the recommended serving size. The serving size equates to the quantity people usually consume, not how much should be consumed. So, all the nutrients that are shown on the label refer to the serving size. If we consider this label,

1 serving = 25 grams, so if 50 grams of supplement is consumed, the calorie and other nutrient values will also double.

2. Calories:

Calories refer to the amount of energy that is yielded from 1 serving of that particular product. So, in this scenario, there are 90 kcal in 1 serving of the supplement. If the entire container is consumed, it would equate to 10 servings or 361 kcal. So, one important point to remember is that the number of servings will determine the number of calories consumed. It is always advised to be mindful of the portion size to avoid excess calorie consumption.

3. Nutrients

The next thing to focus on is the list of nutrients. This list can be used to understand what would be suitable for individual dietary needs. The choice can be made based on which nutrients are required in larger quantities and the nutrients that have to be limited. Ideally, the nutrients that should be limited or consumed in lesser quantities should be saturated fats, sodium, and added sugars. These nutrients are associated with adverse health effects such as increased cholesterol, obesity, and high blood pressure.

One very common confusion is what is the difference between added sugars and total sugars? Total sugars refer to the sugars naturally present in many foods, such as milk and fruits, along with any added sugars present in the product. On the other hand, added sugars refer to the sugars that have been added during food processing, such as dextrose, sucrose, sweeteners like table sugar, etc. So, in this product, the total sugar is 10 grams per serving, and added sugar is 7.6 grams per serving.

Coming to fats, the different types of fats that are mentioned on the package are total fat, trans fat, unsaturated fat, and saturated fat. Out of these, trans and saturated fats increase the risk of cardiovascular diseases. On the other hand, unsaturated fats reduce the risk of heart diseases and are healthier. Ideally, foods with total fat less than 5 grams, saturated fats less than 2 grams, and trans fats at 0 grams should be chosen. Another way to understand the trans fat content is to check the ingredient list and see if ‘partially hydrogenated oils’ is mentioned.

Sodium is another important nutrient whose content must be definitely checked. The daily limit of sodium intake for an adult is limited to 2000 mg/day. Per serving, the amount of sodium may be categorised as:

· Low sodium: <140 mg

· Very low sodium: <35 mg

· No sodium foods: <5 mg

Another nutrient that can usually be misleading is protein. A lot of foods claim to be ‘high protein,’ but the reality can be otherwise. Look for foods that have at least 10-30 grams of protein per serving.

In conclusion, it is important to learn and understand how to spot marketing gimmicks such as low fat, low sodium, natural, etc., and read the labels properly to see whether the health claim is actually right or wrong. Ensure to read these on the label to make an informed purchase: the serving size, ingredients, sugar, fat and sodium content, calories per serve.

Remember: don’t let the label confuse you; let it inform you.

(By Asmita Jotshi, Nutritionist at Cloudnine Group of Hospitals, Pune)

If you are considering switching from dairy to plant-based alternatives such as oat and almond milk, a new study warns that the move could increase the risk of nutrient deficiencies, particularly among women and children.

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Published in The Lancet Planetary Health, the study found that replacing dairy products with unfortified plant-based alternatives could reduce the intake of essential vitamins and minerals.

“With the growing need to address environmental sustainability, many dietary recommendations are focused on plant-based diets and the reduced intake of animal products,” said Dr Katie Nicol, co-author of the study and Research Fellow at the University of Surrey, UK.

Dr Nicol explained that plant-based alternatives may not provide the same micronutrients as dairy products, putting vulnerable groups such as young children and adolescent females at greater risk of deficiencies that could affect their overall health.

Which Nutrients Could Be Lost When Replacing Dairy?

Also read: Can Eating Peanuts Daily Boost Brain Health And Lower Alzheimer's Disease Risk?

The study warned that replacing dairy products, even partially, with unfortified plant-based alternatives could reduce the intake of four essential micronutrients:

• iodine
• calcium
• riboflavin
• vitamin B12.

In the study, the researchers examined the impact of replacing milk, yoghurt and cheese with commercially available plant-based alternatives on micronutrient intake.

They analysed data from more than 3,500 individuals aged between 18 months and 100 years from the National Diet and Nutrition Survey. Using a modelling technique, they assessed how different levels of dairy replacement affected the intake of these four nutrients.

The findings showed that even modest replacements led to marked declines in all four micronutrients, with iodine intake being particularly affected.

Replacing just 20% to 35% of dairy products with plant-based alternatives, under current market fortification levels, increased iodine inadequacy among adolescent females from 54% to 65%. Among women aged 19–49, it rose from 32% to 42%.

With complete replacement, iodine inadequacy increased to 80% among adolescent females and 72% among adolescent males.

Why Is Iodine Particularly Important?

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Iodine is essential for producing thyroid hormones, which regulate metabolism and support healthy growth and brain development.

“People may also be unaware of the importance of iodine, which is needed to make thyroid hormones to regulate our metabolism, support healthy growth and brain development,” said lead author Dr Sarah Bath, Associate Professor at the University of Surrey.

She added that iodine is particularly important during pregnancy, when requirements increase, but adequate stores are also needed before pregnancy.

Dairy products are a major source of iodine, while unfortified plant-based alternatives contain very little of the mineral.

Can Fortification Prevent Nutrient Deficiencies?

The researchers also assessed whether mandatory fortification of plant-based dairy alternatives could help prevent nutrient deficiencies.

They found that fortifying these alternatives with essential micronutrients prevented declines in their intake when dairy products were replaced. However, iodine inadequacy remained high, affecting 59% of adolescent females.

The study also found that iodine-fortified bread could further improve iodine intake, reducing inadequacy among adolescent females to 37%.

The findings suggest that combining mandatory fortification of plant-based dairy alternatives with iodine-fortified bread could be the most effective strategy to reduce iodine inadequacy.