Smorgasbord Health Column – Feeling sluggish and fatigued? Dehydration or the wrong fluids!

I have posted on dehydration before and it is very important that at all ages we take in sufficient fluids. Babies and the elderly dehydrate very quickly and this is dangerous. Currently many of us are in lock down with restricted access to the fresh air and exercise. Those of us heading into winter are now putting our central heating on which does create additional fluid loss.

However, there are times when drinking too much water, particularly in recovery from an illness when food has not been consumed, can have a negative impact on the body and your health.

In this post I am going to look at both sides of the coin to show you how important it is to take in the right fluids.


Recently I noticed that there were a few articles by the experts in the field of nutrition on the subject of hydration. What worried me in particular was that they were touting the belief that you don’t need to drink anymore than your usual cups of tea and coffee as you will obtain sufficient from the food that you eat.

It is true that eating fresh vegetables and fruit will provide you with some fluids but it is still not enough to supply your body with life giving fluids.

We can live for around 6 minutes without air, 6 days without fluids and 6 weeks without food. The very young and the elderly however have a much shorter window than 6 days before dehydration begins to cause severe health issues. In my experience of elderly care most are suffering from borderline dehydration resulting in urinary tract infections, increased symptoms of dementia and if not reversed can become life-threatening very quickly.

Why do we need fluids?

We are as humans made of protein with the few other bits and pieces thrown in. Protein has an extremely high water content and if we were wrung out to dry we would lose approximately 75% of our body weight. It would be a great way to lose weight if we could just plug in a hose and siphon off a couple of gallons from time to time but unfortunately that would be another failed fad diet.  Each major organ consists of fluid including the brain 70% the lungs 90% and 80% in blood. As you can imagine, if those major organs become dehydrated the body is going to demand immediate action.

As an estimate we need 1 litre of fluid for every 50lbs of body weight.

So if you weight 10 stone..140lbs – 63kilos.. you would need 2.5 litres per day in moderate amounts in varied fluids over 16 hours.

We need oxygen, fluid and food in that order

Not all fluids are created equal

  • It is important to look at the quality of the fluids that you then are taking in.
  • If you are eating a diet that is high in industrialised food, any fluid in the food will be contaminated with artificial flavourings, colourants and hydrogenated fats in many cases.
  • If you drink a lot of  coffee, which acts as a mild diuretic (and if you have gallbladder disease or have had it removed, diarrhea)
  • Alcohol is a toxin that not only dehydrates the body but also impairs your kidney and liver function preventing them for removing those toxins from your body.
  • Drinking fizzy sodas, diet or otherwise disrupts the blood sugar levels in your blood.
  • Drinking excessive amounts of mineral water with a high sodium level can disrupt the balance of electrolytes in your system
  • You can obtain fluid content from fruit and vegetables but depending on your environment (warm, hot) they would not be sufficient to supply all you need.
  • Teas, especially green tea and herbal teas do contribute to your daily fluid allowance but essentially there is no substitute for clean tap water.

Here are the symptoms of dehydration that reinforce that concept.

Fatigue and sluggishness.

Our bodies are about balance and they work very hard to maintain the equilibrium whether it is between calcium and magnesium, blood sugar levels, blood pressure, acidity and alkalinity. Even the smallest changes in fluid balance can affect all the other functions within the body including heart function as the organ has to work harder in order to supply the body with the oxygen and nutrients it requires.

As you become more dehydrated your body will begin to make some executive decisions in order to ensure its survival if fluid intake ceases altogether. It redirects blood to the muscles and away from skin areas resulting in a malfunction in our cooling and heating system. We heat up internally resulting in muscle cramps, light-headedness and fatigue.

Because most of us take in at least some liquid our bodies are left in a state of readiness, not quite dehydrated but not receiving the essential fluids it needs to perform efficiently. This means that we are in a constant state of near exhaustion and with inefficient processing power.


As in any part of the body, the brain relies heavily on fats and fluid in the correct balance to function. Loss of fluids thickens the blood, causing the heart to work harder to pump oxygen and nutrients around the system. The brain function is dependent on both oxygen and nutrients and if you are dehydrated it will be affected to varying degrees. Headaches will also vary in severity to mild, just behind the eyes to full blown migraines.

The other consequence can be a feeling of disorientation similar to mild forgetfulness with a touch of dizziness and vertigo.

Skin problems.

There are two issues regarding our skin health and dehydration. One is the inability to flush out toxins from the body, which accumulate in the tissues and in the kidneys and liver. This can result in dry, scaly skin and conditions such as eczema and psoriasis. Additionally water is nature’s moisturiser not only keeping our tissues moist and flexible but also keeping the nutrient rich blood flowing to the tiny capillaries near the skin. Water is actually one of the most effective anti-ageing agents you can use and it is very cheap.

Painful joints and muscles.

Cartilage has a very high water content and dehydration will affect its ability to cushion joints preventing friction, pain and swelling.

I have already established that with sufficient water you can dilute toxins and help flush them from the body but if you are dehydrated the immune system controls are unable to function and bacteria, viruses, heavy metals, poisons accumulate. If you combine lack of exercise to stimulate the circulatory system and dehydration you will suffer both joint and muscle pain.

Poor digestive function.

The digestive process requires fluid. If you drink a pint of water half an hour before a meal (you should not drink excessive amounts with a meal as it dilutes the stomach acid needed to process food) it will pass through the stomach into the intestine and back into the mucous barrier of the stomach. This barrier retains sodium carbonate, which is needed to neutralise acid as it passes through the mucous.

If you are dehydrated too much acid passes through and causes cramps.

Food intolerances and immune system malfunction.

When the body is dehydrated and toxins have accumulated the body’s defence mechanism is activated and histamine is released causing a reaction to anything else that you then put into the system such as food. There are certain foods that have a profile that is allergenic, for example, wheat, tomatoes, spinach, strawberries, seafood, aubergines and peppers. If your body is on the defensive the whole time it will react negatively within a very short space of time. This immune system overload obviously leads to an inability to fight infections, resulting usually in antibiotic intervention and a vicious circle develops.

Thirst and hunger.

There are two issues here. One is the lack of nutrients that are getting around the body in a timely fashion and the other is the hunger/thirst triggers for the body.

Lack of fluids kills the body within about 6 days and over our evolution the body has set up a communication system that will flash messages from the brain to your mouth which will then get dry and uncomfortable until you drink water. Unfortunately we override this messaging system by drinking anything we can lay our hands on in the form of sugar-laden soft drinks, designer coffees and sometimes alcohol. As these really do not satisfy the body’s requirement for pure water to work with you end up being thirsty again in a very short space of time. We develop cravings in an effort to satisfy the demand, which usually includes salty or sweet foods.

Hunger pangs are other signals that your body requires nourishment but if the body is dehydrated it can get confused with the thirst messages. After two or three days of drinking sufficient fluid in a day you will notice a marked reduction in both cravings and hunger pangs.


When does drinking too much fluid cause a problem for the body?

There are a number of organs involved in the processing of the fluids that you drink. And whilst two to three litres of water a day is unlikely to cause a problem in a healthy person, drinking double that can result in in a potentially dangerous effect on kidneys and the brain.

Electrolytes Sodium and Potassium maintain a balance of fluids between the blood and the cells. Drinking excess water (more than a litre an hour in one go) can upset this balance.

Even fit athletes are at risk if they sweat heavily during exercise then drink too much water. Sodium is lost during the exercise and then drinking water drops the level of the remaining sodium resulting in water rushing into the cells and causing them to swell. This is particularly dangerous in the brain.

Early symptoms might be muscle cramps escalating to confusion and even coma.

Potassium levels in the blood are also reduced when too much fluid floods the bloodstream and result in symptoms such as low blood pressure, vomiting and potentially paralysis.

The kidneys filter the blood but if there is excess water they are overworked and this can lead to progressive failure over an extended period of time. Those who already have chronic kidney disease should ensure that they drink adequate fluids (two litres various sources or 8 cups) during the day but spread across the 16 hours in small amounts at a time.

Under normal circumstances the body efficiently processes the fluids you consume with with absorption for most of the daily intake by the small intestine and then into the bloodstream. If you drink excessive amounts of water this increases your blood volume and your heart needs to work harder to push around the body. This progressively strains the organ leading to severe health issues.

Loss of appetite and recovery from illness.

Whilst fluids are very important when you are ill, especially with a fever, it is important that you don’t just drink water. Appetite is depleted and eventually after two or three days your cells will have lost fats and any stored nutrients will be depleted. Especially when there is a fever the body will be losing more fluids and this will add to the depletion of the electrolytes in the blood stream.

Most of our daily requirement of nutrients come from our diet and within a few days our body becomes deficient, particularly of those that would aid in recovery such as Vitamin C and D.

Despite a lack of appetite, fluids are the easiest way to provide much needed nutrition into someone who is ill or in recovery.  It is recommended that liquid is taken in little and often throughout the day so that it is processed without causing strain on both the kidneys and heart, and any nutrients are absorbed effectively.

These can include:

  • Soluble multi-vitamin and mineral supplements.
  • Water containing rehydration solutions
  • Sports drinks – avoid those that use excessive sugar or aspartame and this article highlights what to look for. sports drinks ranked by nutritionist
  • Meal replacement powder mixed with milk or fresh orange juice.
  • Slow cooked soups with vegetables and chicken that can be blended to a fine consistency with a little olive oil or butter.
  • Vegetable smoothies made with carrot juice and containing avocados and a little olive oil
  • Banana milkshakes
  • High water content fruits juiced or pureed with some yogurt.
  • A combination of coconut water (one 4oz serving x twice a day) and fresh fruit juice – my drink of choice. 8 Coconut Water Benefits.

Thank you for dropping in and I hope that you have found useful. As always your feedback is welcome.. thanks Sally.

©Sally Cronin – Just Food for Health – 1998 – 2020

I am a qualified nutritional therapist with twenty-two years experience working with clients in Ireland and the UK as well as being a health consultant on radio in Spain. Although I write a lot of fiction, I actually wrote my first two books on health, the first one, Size Matters, a weight loss programme 20 years ago, based on my own weight loss of 154lbs. My first clinic was in Ireland, the Cronin Diet Advisory Centre and my second book, Just Food for Health was written as my client’s workbook. Since then I have written a men’s health manual, and anti-aging programme, articles for magazines and posts here on Smorgasbord.

If you would like to browse my health books and fiction you can find them here: My books and reviews 2020

Your feedback is always welcome and if you do find that following any of the programmes that I have shared are beneficial then it would be great to hear about it.. you can email me on






50 thoughts on “Smorgasbord Health Column – Feeling sluggish and fatigued? Dehydration or the wrong fluids!

  1. I have to drink two litres a day at the moment, Sally. In fact both Sue and I are supposed to drink three litres a day in the days following chemo, which we both find difficult to do. I probably never took in enough fluid before and rarely felt thirsty so it’s a struggle – and then I’m running to the loo all day and during the night, which is a nuisance. I ring the changes with diluted fruit juice, cordials like elderflower or, my current favourite, cucumber and lime (unfortunately, it has artificial sweetener). I’m not a milk drinker but someone sent me a huge bag of cinnamon sticks and suggested boiling milk with a stick and a little brown sugar then cooling it so I might try that as a bedtime drink. Might try your coconut water idea, too – anything for variety 🙂

    Liked by 4 people

    • Absolutely Mary, go for the variety and you might also enjoy some herbal teas iced.. If I feel nauseous I soak a bag in a small amount of boiling water for five minutes then dilute with cold and put in the freezer for 10 minutes.. you can put a slice of lemon in and it makes for a refreshing change to water. If you are drinking 8oz glass or cup every hour during the day for ten hours you will have taken in 2.25 litres. that gives you about 6 hours before you go to bed and then I suggest you have a glass of water in then night when you get up but you should find you are not up as frequently.. xx

      Liked by 2 people

  2. I know I don’t drink enough, but I do get concerned when I never see anything about drinking too much. I’m so glad you put this into your post, too. There are too many people who think they should drink as much water as they can, and are never seen without a bottle in tow.
    I’ve just been and drunk half a litre!

    Liked by 1 person

  3. So many of my mom’s medical problems in her last few years were related to dehydration. She preached drinking a lot of water all day long. It was only after her mind began to fail her that she started having problems.

    Liked by 1 person

  4. I am also pleased you mention overconsumption of water, Sally which my father did and ended up in the hospital. Obviously, it is important with the heat here to keep hydrated…I drink a mix of water, green tea, fresh coconut juice and fresh smoothies but not those every day…I am not a coffee or English tea drinker…Dry November for me so no sundowners but I feel much better for it already and sleeping better 🙂 xx Linked on Saturday Snippets Hugs xx

    Liked by 1 person

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  7. I have one cup of coffee at the start of the day, some decaff tea later and the rest of the time it’s mainly water or herbal teas (not camomile!). I can’t drink alcohol at all because of migraines and sometimes I get a headache that I now recognise as one caused by too much water and which is put right with a little salt. I’ve never tried coconut water but perhaps I’ll give it a go as others here give it a thumbs-up! Excellent article, Sally!

    Liked by 2 people

  8. Hi Sally, More great advice. I have to keep fluids to a minimum as I get low sodium due to a medication side-effect, so pleased to see you mention have too much fluids. I think many people drink tons of water these days thinking that’s the right things to do. Toni x


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  10. Hydration is So very important. When I get enough water, I don’t feel sluggish or achy. Tomorrow I visit my doctor, and I’m sure he’ll adjust my medications. Thanks, Sally, for helping us stay healthy!


  11. I had an issue after taking Turmeric capsules – stomach cramps and diarrhea. I drank some Smart Water to get my system back in order. Is that a good thing to do? Feeling a little better now.
    This is a wonderful post, Sal! Thank you so much so sharing your wisdom with us!
    🤗 💕

    Liked by 1 person

    • Taking smart water after a stomach upset is fine Janice especially if you are feeling better now.. A reaction to Turmeric or pure curcumin causes the gallbladder to contract producing more bile that is necessary resulting in cramps and diarrhea.. I would suggest perhaps mentioning to your doctor on your next visit. I have a calcified gallbladder and had stones as a result of losing my 150lbs in quite a short space of time 25 years ago and I react in the same way to taking turmeric.. hugsx

      Liked by 1 person

  12. An excellent post, Sally. Dehydration is one of my parents’ main health concerns, and they’ve been to the hospital (both of them) for complications more than once. It’s so hard to get them to drink fluids when I’m not there to put them in their hands. *Sigh* I’m never thirsty either, so I understand their resistance. In my case, I made myself a chart and if I have 50 ounces of water a day for a week, I buy myself a prize! Lol.

    Liked by 1 person

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