Dehydration Temperature Intolerance and Adrenal Fatigue Syndrome

By: Michael Lam, MD, MPH


Staying hydrated is very important to prevent Adrenal Fatigue SyndromeOne of the classic findings in advance AFS sufferers is the need to be carrying a water bottle in order to be constantly hydrated. We call them “water bottle babies”. The need for fluid repletion highlights the metabolic problems within: the inability of the body to fine tune electrolyte balance, especially with regards to sodium and potassium.

Fluids in the human body are balanced through a self-regulating mechanism which stabilizes blood volume and electrolyte levels. This process can be compromised when hormones that regulate these processes become dysregulated. These effects are first seen in late stages of Adrenal Fatigue Syndrome (AFS). Symptoms are subtle at first, but do worsen over time. They include:

  • Inability to tolerate direct sunlight
  • Inability to tolerate a hot bath
  • Crashing after taking being in a sauna
  • Lethargy
  • Stupor
  • Salt cravings
  • Dry mouth
  • Low blood pressure
  • Feeling better with more fluids

Fluid Balance Basics

The average adult human body is fifty-five to seventy-five percent water. Those who are overweight will have more water compared to those who are lean. While one can survive fifty days or more without food, the body can only go without water for a few days before survival is at risk. Maintaining optimum fluid balance is important to achieving general good health. This is especially critical in AFS , where fluid dysregulation is a common occurrence, especially in the advanced stages.

Fluid imbalance presents as a continuum. Unfortunately, conventional medicine is mostly familiar with fluid imbalances at the extreme ends of the scale, with severe dehydration on one end and massive fluid overload at the opposite end. Fluid overload clinically results in pulmonary edema, peripheral edema, and congestive heart failure. These are quickly resolved with administration of medications called diuretics that increase urine output to reduce body fluid load. Deficiency in fluid, or clinical dehydration, is treated with fluid replacement.

Adrenal Fatigue Syndrome makes balancing your fluids very difficultLittle attention is paid when fluid imbalance lies between the two extremes, when symptoms can be evident but laboratory tests are normal. This is especially the case for those on the fluid depletion side of the spectrum. In this subclinical state of dehydration, signs and symptoms are subtle and mild. It is often missed and ignored as an important factors to ailing health.

In a healthy body, thirst is the first response to low fluid levels. This is usually felt when the body has lost around two to three percent of its water. At the cellular level, however, damage begins to occur with as little as one percent loss of water volume. Those with advance AFS fare even worse; compared to a healthy body they exhibit symptoms of fluid imbalance and subclinical dehydration at a lower threshold, and well before laboratory tests show any abnormality.

Fluid Regulation

We begin our discussion first by exploring how the body regulates fluids a whole.

Body fluids are comprised of intracellular and extracellular fluid. The intracellular fluid makes up about two-thirds of body water. The remaining extracellular fluid consists mainly of interstitial fluids between cells, plasma, lymph fluid, spinal fluid, and fluids of the GI tract.

Water moves from one compartment to another due to osmosis. Osmosis is influenced by dissolved solutes in fluids such as minerals and electrolytes. When the fluid compartments of the body contain appropriate concentrations of water and electrolytes, the body is said to be in fluid balance. This is the way nature intended it to be. Problems occur when one compartment has more or less fluid than others do.

The bulk of our daily water intake comes from food and drink averaging 2,300 ml per day. Another 200 ml is produced from our internal metabolic breakdown of nutrients. This average total daily intake of 2,500 ml should equal the total fluid output through the skin, lungs, kidneys and GI tract for the body to be in balance.

When our body is depleted of fluids, the brain initiates a chemical chain reaction that leads to a sensation of thirst by increasing the osmotic pressure of blood passing through the hypothalamus. We respond to thirst by taking in more fluid orally. When the body has excess fluid, output is automatically increased, usually through the kidneys in those who are healthy.

Water output is regulated by antidiuretic hormone (ADH) and aldosterone. Both hormones cause the kidneys to reabsorb more water back from urine to retain in the body.

Antidiuretic Hormone

Antidiuretic hormone (ADH), also known as arginine vasopressin, is secreted from the posterior pituitary gland. After travelling to the kidneys, ADH binds to receptors on cells in the collecting ducts. It promotes reabsorption of water back into circulation, reducing water output. Without ADH, water flows freely out of the body with urine, as the collecting ducts are virtually impermeable to water. The most common ADH related disease is diabetes insipidus. This clinical condition arises from either dysfunction in the hypothalamus or in the kidneys. One of the major signs of either type of diabetes insipidus is excessive urine production, and the resulting dry mouth and increased thirst. Fortunately, ADH dysregulation is a relatively rare cause of fluid imbalance in AFS.

Aldosterone

Aldosterone is a molecule produced by your adrenal glands and depleted during Adrenal Fatigue SyndromeOn top of our kidneys sit the walnut sized endocrine glands called the adrenal glands. These glands secrete over fifty different types of hormones, regulating our ability to deal with stress, libido, inflammatory response, fight or flight response, and fluid balance. Each gland contains two layers. The outer layer is called the adrenal cortex. Three different types of steroid hormones are secreted here: mineralocorticoids, glucocorticoids and sex hormones. The main mineralocorticoid is called aldosterone. Mineralocorticoids are hormones that the body secretes to maintain an adequate fluid and salt balance. Salts are compounds composed of electrolytes like sodium and potassium; and these electrolytes affect the body’s fluid content. Cortisol is the body’s main anti-stress hormone. It also has a weak mineralocorticoid effect and in high enough doses can work like aldosterone.

Basic biochemistry tells us where sodium goes, water follows. Aldosterone signals the kidneys to reabsorb sodium so it does not leave the body with urine. As sodium is retained, so is water. The more aldosterone released by the adrenal glands, the more water is retained in the body. Because the cardiovascular system is a closed system, more water in the body raises blood volume. This added volume increases the pressure within your blood vessels, and translates into higher blood pressure, all else being equal.

The release of the proper amount of aldosterone and cortisol by the adrenal glands is a continuous and automatic process. If the body senses low blood pressure being, more aldosterone is released. A healthy body conducts this automatic process of internal fluid balance without us knowing.
The problem comes when this regulation is dysfunctional or imbalanced, as occurs in those with AFS.

Adrenal Fatigue Syndrome and Aldosterone

Two symptoms specifically reflect the dysregulation of aldosterone as AFS progresses—are salt cravings and low blood pressure.

Adrenal Fatigue Syndrome is a difficult condition and can cause many symptoms through dehydration and fluid imbalanceWhen under stress, the adrenals are put in overdrive to secrete more compensatory hormones, such as cortisol and aldosterone. Typically, levels of both hormones rise in early AFS stages. Because of increased aldosterone, blood volume increases and blood pressure rises. It is common for people experiencing stress to have a higher than normal blood pressure. This is due, in part, to high aldosterone levels. If stress is unrelenting and becomes chronic, AFS progresses to more advanced stages and the adrenals begin to burn out. After reaching its maximum output in early stages, aldosterone and cortisol levels as the adrenal glands become exhausted. The more advanced the stage of AFS, the lower the aldosterone output; and as the aldosterone output falls, the body’s ability to retain fluid is compromised. Salt cravings become more severe and are warning signs of underlying problems. Many under stress automatically reach for salty foods such as potato chips for this reason. They also tend to salt their food more. This is an automatic response to low internal aldosterone levels in AFS sufferers. If unresolved, aldosterone levels continue to drop, contributing to a state of chronic low blood pressure. One can feel dizzy and lightheaded, with reduced urine output. Efforts to increase blood pressure fail even with increased water intake.

Multiple visits to conventional medical doctors are usually made. However, unless a physician is alert and on the lookout for the underlying adrenal dysfunction, the focus of investigation usually falls on the cardiovascular system and kidneys. A thorough workup is often conducted but offers no clues.

The key lies in medical history. Classically, those with chronic stress report increased salt cravings and chronic low blood pressure that continues even when adding more salt in their diet. They often do well with drinking a glass of salt water in the morning and in the afternoon. Consuming foods and snacks high in salt and fat also helps. Unfortunately; few sufferers are asked the key questions to determine whether AFS is a possible cause. As long as laboratory tests are unremarkable, which is often the case, patients are told everything looks normal and are discharged. Even for astute physicians that use blood tests to rule out aldosterone deficiency, subclinical low aldosterone is seldom recognized because tests still show normal or only borderline values. Instead of delving into a patient’s history for more clues, patients are abandoned. There is seldom if any recognition that the symptoms are the consequence of subclinical fluid depletion caused by aldosterone dysregulation as part of AFS.

Adrenal Fatigue Syndrome and Subclinical Fluid Depletion

Aldosterone output is compromised by adrenal weakness; and the more advanced the AFS, the lower the aldosterone level. Without adequate aldosterone to retain sodium, the body loses more water than it retains, resulting in a chronic state of subclinical dehydration.

The more advanced the fatigue, the more evident subclinical dehydration becomes. Common symptoms include chronic low blood pressure, lightheadedness, dizziness, and orthostatic hypotension. Electrolyte balance is not usually a problem early on, but becomes a concern as AFS progresses to late stages, if fluid imbalance is not addressed and reversed properly.

Signs of Fluid Imbalance

Adrenal Fatigue Syndrome can lead to fluid imbalances and many other symptomsAs AFS progresses to later stages, there are telltale signs that our body generates well in advance as notification of its need for fluids. This can takes years and sometimes even decades to develop. Early symptoms to be on the lookout for include: brain fog, increased thirstiness, heartburn, urinary tract infections, dry mouth, reduced skin elasticity, wrinkles, dry skin, darkly colored urine, and constipation. Unfortunately, few are aware of these subtle signals, especially in the early stages of AFS.

Advanced signs of a body hungry for fluid include chronic low blood pressure, postural hypotension, postural tachycardia, dizziness on arising, cardiac arrhythmia, adrenal crashes, lethargy, and heat intolerance. These are more commonly seen in those with AFS at Stage 3 or higher. They only become evident when water depletion or electrolyte imbalance have become chronic. Routine laboratory tests of fluid balance, including sodium, potassium, and creatine clearance, still often continue to report normal values despite these signs of subclinical fluid depletion.

Fluid and Electrolyte Replenishment

The obvious solution to fluid depletion is fluid replacement. For AFS sufferers this must be done with care, as there is the possibility of further disrupting a fragile electrolyte balance. Therefore the proper amount of sodium should be mixed with water to maintain optimal osmolality.

When healthy, our body requires an intake of over two quarts of water (eight glasses of eight ounces each) for normal function. Depending on our diet, about half to one quart each day is provided by the food we eat. The rest of it has to be taken in apart from this. A good rule of thumb is to drink eight glasses of pure water (non-caffeinated drinks) a day in addition to your food.

To achieve optimum hydration for AFS recovery, it is important to bathe the body internally with ample water balanced with electrolytes. About one quart (four glasses of eight ounces each) of pure filtered water per day for every fifty pounds of body weight is the recommended minimum. For the average 150-pound AFS sufferer, this translates to three quarts (12 glasses of 8 ounces each) a day, or fifty percent more than that recommended for routine bodily function. Those exposed to hot environments need substantially more. That is why AFS sufferers should avoid excessive direct sunlight and cut down outdoor activities in hot weather. Furthermore, water intake should increase by one 8-ounce glass for each 25 pounds above ideal body weight.

If you are taking in liquids that act as a diuretic (such as coffee, tea, and certain sodas), you will need more water to compensate for the water loss due to these dehydrating drinks. A good rule of thumb is to drink one extra glass of water for the equivalent amount of each such drink you consume.

The above are general guidelines only. The exact amount varies from person to person and the body’s state of fatigue. Those who are in advanced stages need to be very careful not to drink too much water without making sure that the body’s internal electrolyte balance is well regulated.

Too much water without enough sodium can lead to a state called dilutional hyponatremia. Symptoms can include lethargy, fatigue, and in extreme cases coma. Conversely, too much salt without enough accompanying water can drive up blood pressure, reduce potassium, and trigger abnormal cardiac function. Professional guidance is critical for anyone in a sensitive state of electrolyte dysregulation or that has a history of sodium/potassium imbalances because the body can decompensate quickly.

Practical Hydration Tips

Keeping hydrated is vital when in Adrenal Fatigue SyndromeThose afflicted with AFS are usually in a state of subclinical fluid and salt depletion as well as fragile electrolyte balance. Their fluid requirements are therefore higher than those of a normal healthy individual. The following tips should be considered:

It is good practice to always carry a filled water bottle throughout the day so as never to be out of reach of water. If tolerated, a bit of lemon juice or a few slices of lemon should be mixed in the water. The container should be glass if possible. Those with sensitive gums should consider using a straw when taking in water with lemon.

Make it a habit to drink more fluid than you need. Do not wait until you are thirsty, as thirst itself is a late warning sign of underlying dehydration.

Because sodium depletion is common, many feel energized when their water contains a bit of salt. Sea salt should be mixed with water if tolerated.

Avoid excessive exposure to direct sunlight. For some, this may mean less a few minutes, especially if they are in advanced stages of AFS.

If outdoor exposure is unavoidable, carry an umbrella for shade, or wear protective headwear and clothing. Take frequent hydration breaks. Always have snacks handy to prevent hypoglycemia.

It is important that water intake be consistent and gradual. Drinking too much water too fast can trigger an adrenal crash if there is a sudden dilution of sodium within the body. As mentioned earlier, this is called dilutional hyponatremia. When this happens, fatigue increases and one should seek medical attention. In severe cases, symptoms include stupor and lethargy and hospitalization may be required.

Food and Beverage Alert

Bewared of what your drink and eat while suffering from Adrenal Fatigue SyndromeIt is important to avoid any caffeinated drinks such as tea and coffee as they contain caffeine, a natural diuretic. Fruits such as pineapple, watermelon, cranberry, pear, peach, grapefruit, honeydew, and strawberries should be consumed in moderation because of their high potassium content which acts in opposition to sodium. Lemons also fall in this category, but with AFS, it has the positive attribute of being a pH balancer. The slow release of vitamin C from lemons far outweighs its slight diuretic property and should be used whenever possible. Apples are also an exception because of its tremendous value in providing a steady source of carbohydrates when the body is fatigued.

Green vegetables with high water content should be avoided because they are among the most potent natural diuretics because of their mineral, water, and fiber content. Many are high in potassium and magnesium, both of which act in opposition to sodium. These include celery, cucumber, carrot, eggplant, asparagus, beet, spinach, seaweed, pumpkin, green bean, artichoke, garlic and onion. Cruciferous vegetables should also be avoided as they are rich in sulfur and also have diuretic properties. They include Brussels sprouts, cabbage, and watercress.

Always consult your physician if you are altering your diet to include natural diuretics when you are already taking diuretic medication.

 

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Staying hydrated is very important to prevent Adrenal Fatigue Syndrome