Questions tagged [water]

A colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms. It is supplied to houses or commercial establishments through pipes and taps.

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3 answers
986 views

Do most people actually manage to drink 2 litres of water a day? [closed]

So, I try to drink a decent amount of water. But I can't drink anywhere near 2 litres a day (which apparently is the recommended daily intake). I do drink quite a few cups of coffee. And I'm aware ...
1 vote
1 answer
143 views

Why does distilled Water have First Aid instructions in case of contact with eyes or mouth?

On a bottle of distilled water, there is a paragraph called First Aid that reads: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If swallowed, rinse ...
4 votes
2 answers
38k views

can I mix cool water with hot water

My workplace has very hot water and very cool water which is not drinkable. Can I mix both... is it good for health? Are there any ill effects if you drink a hot and cold water mixture?
1 vote
0 answers
38 views

Removing pesticide residue from fruits and vegatables

I just came to know from a friend that washing fruits and vegetables with alkaline water is very effective in removing pesticide residues. I looked on internet and found some studies arguing that it's ...
2 votes
0 answers
56 views

What should be the ideal total dissolved solids level of drinking water? [closed]

This is one of the most controversial and highly debated topics in India these days, especially since the popularity of reverse osmosis (RO)/UV filters started rising a few years ago. Even if you ...
0 votes
0 answers
75 views

Does psyllium husk work differently on human body when consumed with different temperature of water? If yes, what are the reasons behind it?

There are some health benefits always discussed about psyllium husk. Such as described here and here. Now some people on social media spread myths like it works better with yoghurt. It works better ...
1 vote
0 answers
17 views

Can oresol electrolyte rehydration relievers relieve a runny nose caused by sinusitis? [closed]

I have had sinusitis since childhood, and it got worse after having covid 19, I used to have frequent runny nose, it made me very uncomfortable, but everything got better when I used oresol (...
1 vote
1 answer
53 views

Does the digestive process in humans consume water?

This question arose out of a discussion about fasting during Ramadan. Which, if you are not aware, involves abstaining from eating and drinking between dawn and dusk. Something which can be quite ...
0 votes
1 answer
137 views

What is the best pH of drinking water? [closed]

I have seen that soft drinks are harmful to the body due to the very differing level of pH. I have also seen that our aged body become acid through time. And alkaline when young. The Physiological ...
2 votes
1 answer
145 views

Daily dose of recommended water

Here (https://www.health.harvard.edu/staying-healthy/how-much-water-should-you-drink) it says to drink four-to-six cup of water. I find it weird that they don't mention how big the cup should be? How ...
1 vote
0 answers
22 views

Water/sodium balance in diabetes insipidus

Practitioners from my country (France) tend to classify disorders of water and sodium balance as either concerning the intracellular compartment (IC), the extracellular compartment (EC) or both. I ...
0 votes
0 answers
29 views

How long is the delay when rehydrating orally vs. IV?

The going recommendation for patients who present to the emergency room with dehydration is IV fluids. It seems to me that this is fairly wasteful and needlessly expensive. Is rehydrating with a ...
-1 votes
1 answer
66 views

Why is dehumidifier water not fit to drink? [closed]

Looking at the instruction manual for a dehumidifier, I note that it says the condensed water is not fit for drinking and should be disposed of. Okay, but why? This is literally distilled water, ...
6 votes
2 answers
101 views

Why could standard demineralized water be harmful?

Aside from the obvious (electrolyte loss), why could standard demineralized water be harmful? If you buy the usual demineralized water at the hardware store (for car batteries, steam irons, …) ...
1 vote
0 answers
65 views

Why should you not wash injection site after a vaccine (layman question)?

Non-medical person here, but my question, I think, is on topic for this site. Every time after I've gotten a vaccine injection I've always been given a variation of the same advice - "Don't wash/wet ...
2 votes
0 answers
71 views

What's the lowest height falling from which into clear deep water can theoretically cause any injury on impact?

I'm researching it for a computer game mechanics change (the game is free and open source, I'm not doing it for profit). The question is: at what height it is theoretically possible for an average and ...
2 votes
0 answers
34 views

Hydroxyl radicals effects on human body from drinking KDF copper/zinc filtered water

There are many water filters that use KDF in place of, or in conjunction with, granular activated carbon filters to produce drinking or shower water by removing heavy metals and chlorine from it. It ...
2 votes
1 answer
198 views

How quickly would boiling water kill coronavirus?

How quickly would boiling water kill coronavirus? There are numerous articles telling us to disinfect groceries - wash all packages with soap and water and then disinfect with wipes, also wash ...
-2 votes
1 answer
79 views

How to Determine How Much Water to Drink [closed]

I am planing to develop a mobile application to monitor the water intake level of a person. I found the following calculator, but I have no idea what is the formula that they have used in the ...
26 votes
2 answers
43k views

Does hot water kill germs better than cold water?

I was recently told that I should use hot water to wash my hands rather than using cold water because the hot water will kill germs better. The person who told me this isn't a very reliable source, so ...
0 votes
1 answer
31 views

Is it healthier to live by the coast or inland?

I've asked this question on life hacks and been told to go ask it on medical or travel. It's nothing to do with travel in my opinion. I have heard/ read so many conflicting statistics about the sea ...
6 votes
1 answer
388 views

Can drinking ultra-pure water be dangerous?

I work in a molecular biology laboratory, where we have a special filtration system for producing ultra-pure water for buffers, reagents, etc. Around the lab, I have heard many times what sounds to me ...
1 vote
1 answer
79 views

Fluid balance range for human

I am working on clinical data analysis with patients from icu who are mechanically ventilated and in ICU for 4 or more days. Currently I tried to calculate their fluid balance based on the input and ...
2 votes
0 answers
47 views

Why does the brain shrink and increase energy usage after dehydration?

Along with mood and energy deficits a dehydrated brain has to use a lot more energy to accomplish the same tasks, shows a study from King's College London. Quote from Dehydration affects brain ...
13 votes
3 answers
17k views

How often should you drink water? Not how much

We all know how much water we should be drinking. However, I have a close friend that only drinks 1.5 litres of water once a day. Keep in mind that they do consume other liquids with food. ...
2 votes
1 answer
99 views

Is it safe to reboil tap water? [duplicate]

A friend of mine made the claim that I should empty my water kettle and not reboil the water that was left over. He said it has negative health effects but could not explain why. Is he right, what ...
27 votes
2 answers
2k views

Is drinking water during or after a meal better?

Is it better to drink water during or after a meal? Clearly, there are different opinions about this topic. In this Mayo Clinic article, it is mentioned that drinking water immediately after or ...
1 vote
1 answer
78 views

Best type of water to drink? [closed]

I have done some reading and it seems to come down to these 2 choices : Spring or Mineral water ( from earth ) Reverse Osmosis with added ozone ( any water processed ) As I understand with Reverse ...
2 votes
1 answer
135 views

What is the best way to obtain pure drinking water in the U S?

Tap water is awful in the U S. I am looking for a way to drink pure drinking water. I researched many options carbon filters is a basic option . However they do not remove fluoride distilled water ...
10 votes
1 answer
200 views

Is it ineffective to drink cold water to cool down when you are warm?

I have heard many times that drinking cold water when you are warm is not an effective way to cool down. The most common supposed reason that I have heard is that the body needs to spend a ...
4 votes
1 answer
127 views

Supersaturation vs Undersaturation of the Urine | Kidney Stones

A significant factor that determines if a crystal will develop into a kidney stone is the saturation of the urine with stone-forming salts. From my understanding, supersaturation leads to precipitates ...
1 vote
1 answer
5k views

Is it not healthy way to boil water in plastic electric kettle?

I am planning to buy 1L electric kettle to make green tea as I live in a hostel. I live in India. Most of the products, in my budget, are made out of plastic and many comments under these product's ...
1 vote
1 answer
301 views

How long would someone be able to live if they suddenly became allergic to water?

Inspired by this tale - https://www.thefreelibrary.com/JUST+ONE+CUP+OF+WATER+COULD+KILL+LITTLE+HEIDI%3B+Girl%27s+deadly+allergy...-a061152595 Let's say someone is so allergic to H2O that a sip of ...
1 vote
1 answer
73 views

How can I mitigate the risk of toxic compounds leeching from a water bottle?

Wikipedia says that: Research is ongoing as to whether plastic water bottles can leach hazardous chemicals into the water, especially when heated. And I know it's now fashionable for vendors to ...
1 vote
1 answer
93 views

Definition of a (food) calorie and burning food calories

From what I've been reading, a (food) calorie is defined to be the energy needed to raise the temperature of 1 kilogram of water through 1 °C, equal to one thousand small calories and often used to ...
9 votes
1 answer
199 views

Which one is more harmful for your kidneys, drinking more or less water?

Which is more harmful for your kidneys? Drinking more than enough water or having less than the minimum amount required?
1 vote
1 answer
1k views

How much water weight is it normal to lose while sleeping?

When you sleep, you sweat out and breathe out some water, but how much is normal to lose, assuming you're not actively trying to make yourself sweat?
16 votes
1 answer
31k views

Why does it hurt to accidentally gulp air while drinking water?

Sometimes when I'm chugging water, I accidentally swallow a big gulp of air. It's extremely painful. As I understand it, water is less compressible than air and people inadvertently swallow air ...
5 votes
1 answer
57 views

Hard water and cardiovascular problems

Wikipedia cites one 1970 study by Voors claiming that drinking hard water lessens the odds of dying from atherosclerosis. The stud itself even makes some bolder claims stratified by race, namely that ...
4 votes
2 answers
113 views

Would showering with germicidal water be beneficial or harmful?

Suppose a device was able to make water remove 99.99 % of bacteria on the incident surface (assuming that the water is germicidal by itself, whatever the reason – e.g. by means of an additive which ...
2 votes
1 answer
56 views

Limited amount for drinking water?

I got a toothache few days ago and since holidays were here the dentists didn't work. It hurt day and night and the pain was extreme but luckily for me I figured out that cold water helped me. I ...
1 vote
0 answers
5k views

What is the formula for calculating Body Water Percentage?

Given the available inputs of Gender Age Height (cm) Weight (kg) Fat (%) Muscle Mass (%) I know the Watson Formula calculates Total Body Water (in Litres) as TBW(Male) = 2.447 - 0.09156 X age + 0....
4 votes
1 answer
425 views

How much water is too much?

What causes "Water intoxication"/"Excessive water"/"Overhydration"? I've read in a bunch of articles about people drinking more than a few liters per hour in a short amount of time. I've also read ...
8 votes
2 answers
57k views

how it's better to drink water, fast or slowly?

I usually drink water by small slips and I read that it's the best way to do this, for example: First off, sit down to drink (just as you should sit down to eat). Take sips, not full-glass ...
0 votes
1 answer
132 views

Why do I feel dehydrated when I wake up very early? [closed]

Occasionally I have to get up very early for flights, surveys etc and only get a couple of hours sleep. As soon as I wake up, my throat feels completely dry and I am extremely dehydrated. The only way ...
3 votes
1 answer
105 views

Filtered water vs boiled water

I live in Bombay, India. We boil our water here, and have done so for many years. I'm wondering if a serious water purifier e.g. RO + UV would be a better way to go. In this context, better means, ...
6 votes
2 answers
378 views

Why drinking unflavored sparkling water has such an aggressive effect on teeth?

I would say it because of the erosion of the enamel by its carbonated acid, but is it really the case?
1 vote
1 answer
3k views

is saltwater bad or good for your skin?

After swimming into the sea, is it better take shower immediately or wait several hours? I found this on yahoo.anwers: Best Answer: Salt water can dry up the natural oils in your skin, and this ...
4 votes
1 answer
160 views

What is the difference between soda water and water?

Assuming both water and soda water come from the same tap water source, and the soda water does not have any additives or flavoring. (aka not pop) What effect would soda water have on the human body ...
2 votes
1 answer
2k views

How much water does a 30 year old male need to drink daily?

I am a 30 year old male. My job requires me to sit at a desk from 9-6. While working, I often forget to drink water. One in a while, on some days, I do a few exercises after work. But most days I don'...